As long as zeta is not zero, that is not a problem. vpa(expand(subs(zetaroots,{a,b,m1,m2},[-2.0800,4.0800,0.5,-0.03])),5), - (0.16667*(96.154*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 5340.2*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3) + 256.82*z^2 + 70.15)^(1/2))/(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/6) - (0.16667*(10680.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3)*(96.154*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 5340.2*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3) + 256.82*z^2 + 70.15)^(1/2) - 70.15*(96.154*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 5340.2*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3) + 256.82*z^2 + 70.15)^(1/2) - 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3)*(96.154*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 5340.2*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3) + 256.82*z^2 + 70.15)^(1/2) - 256.82*z^2*(96.154*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 5340.2*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3) + 256.82*z^2 + 70.15)^(1/2) + 2868.6*z*(5.1962*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 6767.6*z - 8231.4*z^3 - 125699.0)^(1/2) + 106211.0*(5.1962*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 6767.6*z - 8231.4*z^3 - 125699.0)^(1/2) + 192.31*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3)*(96.154*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 5340.2*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3) + 256.82*z^2 + 70.15)^(1/2))^(1/2))/((0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/6)*(96.154*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 5340.2*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3) + 256.82*z^2 + 70.15)^(1/4)) - 12.179, (0.16667*(10680.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3)*(96.154*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 5340.2*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3) + 256.82*z^2 + 70.15)^(1/2) - 70.15*(96.154*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 5340.2*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3) + 256.82*z^2 + 70.15)^(1/2) - 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3)*(96.154*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 5340.2*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3) + 256.82*z^2 + 70.15)^(1/2) - 256.82*z^2*(96.154*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 5340.2*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3) + 256.82*z^2 + 70.15)^(1/2) + 2868.6*z*(5.1962*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 6767.6*z - 8231.4*z^3 - 125699.0)^(1/2) + 106211.0*(5.1962*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 6767.6*z - 8231.4*z^3 - 125699.0)^(1/2) + 192.31*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3)*(96.154*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 5340.2*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3) + 256.82*z^2 + 70.15)^(1/2))^(1/2))/((0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/6)*(96.154*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 5340.2*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3) + 256.82*z^2 + 70.15)^(1/4)) - (0.16667*(96.154*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 5340.2*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3) + 256.82*z^2 + 70.15)^(1/2))/(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/6) - 12.179, (0.16667*(96.154*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 5340.2*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3) + 256.82*z^2 + 70.15)^(1/2))/(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/6) - (0.16667*(10680.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3)*(96.154*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 5340.2*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3) + 256.82*z^2 + 70.15)^(1/2) - 70.15*(96.154*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 5340.2*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3) + 256.82*z^2 + 70.15)^(1/2) - 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3)*(96.154*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 5340.2*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3) + 256.82*z^2 + 70.15)^(1/2) - 256.82*z^2*(96.154*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 5340.2*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3) + 256.82*z^2 + 70.15)^(1/2) - 2868.6*z*(5.1962*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 6767.6*z - 8231.4*z^3 - 125699.0)^(1/2) - 106211.0*(5.1962*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 6767.6*z - 8231.4*z^3 - 125699.0)^(1/2) + 192.31*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3)*(96.154*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 5340.2*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3) + 256.82*z^2 + 70.15)^(1/2))^(1/2))/((0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/6)*(96.154*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 5340.2*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3) + 256.82*z^2 + 70.15)^(1/4)) - 12.179, (0.16667*(96.154*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 5340.2*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3) + 256.82*z^2 + 70.15)^(1/2))/(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/6) + (0.16667*(10680.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3)*(96.154*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 5340.2*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3) + 256.82*z^2 + 70.15)^(1/2) - 70.15*(96.154*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 5340.2*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3) + 256.82*z^2 + 70.15)^(1/2) - 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3)*(96.154*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 5340.2*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3) + 256.82*z^2 + 70.15)^(1/2) - 256.82*z^2*(96.154*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 5340.2*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3) + 256.82*z^2 + 70.15)^(1/2) - 2868.6*z*(5.1962*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 6767.6*z - 8231.4*z^3 - 125699.0)^(1/2) - 106211.0*(5.1962*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 6767.6*z - 8231.4*z^3 - 125699.0)^(1/2) + 192.31*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3)*(96.154*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 5340.2*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3) + 256.82*z^2 + 70.15)^(1/2))^(1/2))/((0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/6)*(96.154*z*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 5340.2*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(1/3) + 9.0*(0.096225*(2.07e6*z^4 + 7.6638e7*z^3 + 1.1346e6*z^2 + 6.3008e7*z + 5.8506e8)^(1/2) - 125.33*z - 152.43*z^3 - 2327.6)^(2/3) + 256.82*z^2 + 70.15)^(1/4)) - 12.179. Numerical approximation of the inverse Laplace transform for use with any function defined in "s". It seems that mathematically a closed inverse Laplace form for this function cannot be found out, so ilaplace function is returning the input transfer function. We do not give the general procedure here because we will soon explain how to use MATLAB to compute a matrix inverse. Examples of Numerical Approximation of the Inverse Laplace Transform. ans =[ 3/4, 1/2, 1/4][ 1/2, 1, 1/2][ 1/4, 1/2, 3/4] Compute the inverse of the following symbolic matrix. symbolic variable var as the independent variable, such that MathWorks is the leading developer of mathematical computing software for engineers and scientists. So there are 4 roots. Example. Other MathWorks country sites are not optimized for visits from your location. thanks. If the determinant of the matrix is zero, then the inverse does not exist and the matrix is singular. In that case, zeta==0 would be one of the roots of the above equation. The examples cover functions with known inverses so that the accuracy can easily be assessed. Reload the page to see its updated state. Array-valued function flag, specified as the comma-separated pair consisting of 'ArrayValued' and a numeric or logical 1 (true) or 0 (false).Set this flag to true or 1 to indicate that fun is a function that accepts a scalar input and returns a vector, matrix, or N-D array output.. I have tried multiple ways to do a numerical approximation inverse of this function and looked up other threads where people had similar issues and it seems that it really jsut comes down to the way Matlab defines its own arbitrary functions, making it not able to solve certain equations/functions. We will go through the steps of deriving a simple inverse kinematics problem. Can someone tell me how is it possible to find the inverse of this function, I used Matlab function "roots" to solve the following inversion problem. The notable differences between Matlab’s and NumPy’s & and | operators are: Non-logical {0,1} inputs: NumPy’s output is the bitwise AND of the inputs. For the above example, what would be the input? To increase the computational speed, reduce the number of symbolic variables by … Here I wrote the inverse function by solving through the fzero command, however, I don't know why it … https://www.mathworks.com/matlabcentral/answers/441843-how-to-find-the-inverse-of-a-function-numerically#comment_664856, https://www.mathworks.com/matlabcentral/answers/441843-how-to-find-the-inverse-of-a-function-numerically#comment_664858, https://www.mathworks.com/matlabcentral/answers/441843-how-to-find-the-inverse-of-a-function-numerically#comment_664867, https://www.mathworks.com/matlabcentral/answers/441843-how-to-find-the-inverse-of-a-function-numerically#comment_664869, https://www.mathworks.com/matlabcentral/answers/441843-how-to-find-the-inverse-of-a-function-numerically#comment_664870, https://www.mathworks.com/matlabcentral/answers/441843-how-to-find-the-inverse-of-a-function-numerically#comment_664881, https://www.mathworks.com/matlabcentral/answers/441843-how-to-find-the-inverse-of-a-function-numerically#comment_664890, https://www.mathworks.com/matlabcentral/answers/441843-how-to-find-the-inverse-of-a-function-numerically#comment_664893, https://www.mathworks.com/matlabcentral/answers/441843-how-to-find-the-inverse-of-a-function-numerically#comment_664895, https://www.mathworks.com/matlabcentral/answers/441843-how-to-find-the-inverse-of-a-function-numerically#answer_358300, https://www.mathworks.com/matlabcentral/answers/441843-how-to-find-the-inverse-of-a-function-numerically#comment_664908, https://www.mathworks.com/matlabcentral/answers/441843-how-to-find-the-inverse-of-a-function-numerically#comment_664962. Numerical Tours of Signal Processing. There is a community submission at MathWorks File Exchange which numerically approximates an inverse Laplace transform for any function of "s". However, the inverse of a 2 x 2 matrix MathWorks is the leading developer of mathematical computing software for engineers and scientists. g = finverse(f) returns the inverse of function f, such that f(g(x)) = x. Returns a list with components x the x-coordinates and y the y-coordinates representing the original function in the interval [t1,t2]. The problem is, the "inverse" is a rather nasty mess of a function of z. But for now, how do we find those 4 values? You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. g = finverse (f,var) uses the … Only a few of the summaries are listed -- use Matlab's help function to see more. Most physical problems can be written in the form of mathematical equations (differential, integral, etc.). A prompt for students to write a discussion post on the most difficult topic in a chapter. Compute functional inverse for this trigonometric function. Details. Inverse of a matrix A is given by inv(A). g = finverse(f) returns the inverse of Your equation reduces to, b*m2 + (a + b*m1)*zeta - z*zeta^2 + (a*m1 + b)*zeta^3 + (a*m2)*zeta^4 == 0. g = finverse(f,var) uses the The transform Fs may be any reasonable function of a variable s^a, where a is a real exponent. Limitations. Matrix computations involving many symbolic variables can be slow. There are 4 solutions. Choose a web site to get translated content where available and see local events and offers. It is easy to do so if the function can be converted in a polynomial, but in my case, the function seems to be complicated. I really don't know how to form the matrix so that I can use "roots". Good work.I will be grateful if someone helps me with an implicit runge-kutta matlab code for the solution of ode. An answer for a much more generalised form of function is available here, https://uk.mathworks.com/matlabcentral/answers/441867-tthe-inverse-of-a-function-numerically-with-n-terms, You may receive emails, depending on your. The inverse of a matrix does not always exist. But you wrote you already used "roots" on the example: Torsten, the original question does not allow me to make such matrix. Sorry, I am really clueless about this problem. This is a good question, @Torsten! Mathematicians have always sought to find analytical solutions to the equations encountered in the different sciences of the engineer (mechanics, physics, biology, etc.). The inverse of a 3 x 3 matrix requires us to evaluate nine 2 x 2 determinants. Learn more about inverse function INVERSE' 'numerical modeling of earth systems university of texas june 15th, 2018 - 2 2 1 linear inverse problems 1 d heat conduction with ?nite elements e g dabrowski et al 2008 moreover matlab code does' 'Numerical Solution of a Nonlinear Inverse Heat Conduction June 15th, 2018 - Numerical Solution of a Nonlinear Inverse Heat Conduction Problem Compute functional inverse for this exponential function by specifying the Which of them would you like to choose ? Numerical Derivative We are going to develop a Matlab function to calculate the numerical derivative of any unidimensional scalar function fun(x) at a point x0.The function is going to have the following functionality: Usage: D = Deriv(fun, x0) So there are 4 roots. We are given a >> help HELP topics: matlab/general - General purpose commands. matlab/lang - Language constructs and debugging. Of the coefficients of the above equation, all are apparently known, and have fixed values. I normally choose the last solution. syms a b c dA = [a b; c d];inv(A) ans =[ d/(a*d - b*c), -b/(a*d - b*c)][ -c/(a*d - b*c), a/(a*d - b*c)] Compute Inverse of Symbolic Hilbert Matrix. Then the "inverse" is given as any of the 4 roots of that equation, thus: zetaroots = solve(b*m2 + (a + b*m1)*zeta - z*zeta^2 + (a*m1 + b)*zeta^3 + (a*m2)*zeta^4,zeta,'maxdegree',4); You don't want me to write the entire expression in here, as it is a massive mess of terms. We only need to worry about zeta==0 if either of b or m2 was zero. You clicked a link that corresponds to this MATLAB command: Run the command by entering it in the MATLAB Command Window. To use "roots" we need a matrix as the input, aren't we? I have provided an example. You don't want me to write the entire expression in here, as it is a massive mess of terms. function f, such that f(g(x)) = x. Numerically, find the zero x of f (x)-a=0 to get f^ (-1) (a) (e.g. I am trying to find the inverse of an function, g, numerically, as the explicit form of it is complex. Based on your location, we recommend that you select: . This set of functions allows a user to numerically approximate an inverse Laplace transform for any function of "s". If f contains more than one variable, use the next syntax to specify the independent variable. I have posted another question related to this post which consider a much more generalised form of function. Then the "inverse" is given as any of the 4 roots of that equation, thus: zetaroots = solve(b*m2 + (a + b*m1)*zeta - z*zeta^2 + (a*m1 + b)*zeta^3 + (a*m2)*zeta^4,zeta. Recent posts. Yes, it is true that there will be more than one solution. Invert a numeric or complex matrix. Contribute to gpeyre/numerical-tours development by creating an account on GitHub. Input, specified as a symbolic expression or function. The inverse of a function numerically with N-terms. The details of computing a matrix inverse can be found in many texts; for example, see [Kreyzig, 1998]. Create a script file and type the following code − For example (3 & 4) in NumPy is 0, while in Matlab both 3 and 4 are considered logical true and (3 & 4) returns 1. If f contains more than one variable, use the next syntax to specify the independent variable. Based on your location, we recommend that you select: . f(g(var)) = var. Learn more about inverse function MATLAB FUNCTION DESCRIPTIONS . The default value of false indicates that fun is a function that accepts a vector input and returns a vector output. matlab/ops - Operators and special characters. In pracma: Practical Numerical Math Functions. How to arrange the matrix for such function, Torsten? Description Usage Arguments Details Value Note See Also Examples. Like Like You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. How to find the inverse of a function numerically. These equations are sometimes complicated and much effort is required to simplify them. Matlab treats any non-zero value as 1 and returns the logical AND. when the inverse is not unique. How do I do that in MATLAB for USF students How do we determine the solution? and use to function "roots" to find the solution. Oh probably I can do it by multiplying them with, Multiply by zeta^2, and collect terms. If Assuming the parameters of your Hill function are [10 25 2], and you want to find the point where the value of the function is 9, this point is given by: View source: R/inv.R. Find the treasures in MATLAB Central and discover how the community can help you! finverse does not issue a warning The following Matlab project contains the source code and Matlab examples used for numerical inverse laplace transform. Inverse of a matrix in MATLAB is calculated using the inv function. Unable to complete the action because of changes made to the page. Accelerating the pace of engineering and science. independent variable. Imposing these conditions is dirty, and there's a better way to find the inverse numerically using fzero. I'm not at all sure what you expected the inverse of your function would look like. Mathematical Modeling with Symbolic Math Toolbox. Description. Choose a web site to get translated content where available and see local events and offers. Inverse Matrix Function Basics: Brief Tutorial ... a matrix is a means via which a numerical data set can be organized and represented by an ordered row and column of variables. For your example, there will be 4 zeta-values that satisfy the last equation. This MATLAB function returns the Inverse Sine (sin-1) of the elements of X in radians. ... is the function name used in Matlab… Accelerating the pace of engineering and science. Other MathWorks country sites are not optimized for visits from your location. Applied Numerical Methods Using MATLAB ®, Second Edition begins with an introduction to MATLAB usage and computational errors, covering everything from input/output of data, to various kinds of computing errors, and on to parameter sharing and passing, and more. These lists are copied from the help screens for MATLAB Version 4.2c (dated Nov 23 1994). [2] ... will have an inverse. Web browsers do not support MATLAB commands. using MATLAB's "fzero"). How do I suppose to transform the following matrix into polynomial so that I can use "roots"? I have a 4x3 matrix(S) and i want to calculate the inverse of it, the matrix is: 1.7530 0 0 0 0 0.1009 0 0 0 0 0.0149 0 but since it is not a square matrix when i use S -1 it says i have to use elemental wise power. f contains more than one variable, use the next syntax to specify the This script demonstrates using the included Talbot and Euler algorithms for numerical approximations of the inverse Laplace transform. Even if I show only 5 digit numbers in that expression for all coefficients, it is still a nasty mess. Numerical Methods for Inverse Kinematics Niels Joubert, UC Berkeley, CS184 2008-11-25 Inverse Kinematics is used to pose models by specifying endpoints of segments rather than individual joint angles. MATLAB: How to solve this matrix using inverse function inverse I want to use the inverse function (inv) on this 10 x 10 matrix but I keep getting all this Inf in place of the numbers. Form the matrix is singular 23 1994 ) numerically approximate an inverse Laplace transform can you! Visits from your location, we recommend that you select: learn more about inverse function inverse... Form of mathematical computing software for engineers and scientists original function in the MATLAB command Window look! Dated Nov 23 1994 ) have fixed values function of z worry about zeta==0 if either of b or was. Will soon explain how to arrange the matrix for such function, Torsten the... Development by creating an account on GitHub of changes made to the page vector output numbers in that expression all. -- use MATLAB 's help function to see more sorry, I am really clueless about problem... Implicit runge-kutta MATLAB code for the solution of ode are listed -- use MATLAB 's help to. Conditions is dirty, and have fixed values really do n't want me to write a discussion on! The transform Fs may be any reasonable function of `` s '' algorithms for numerical approximations of inverse! Be any reasonable function of z and much effort is required to them. Matlab treats any non-zero Value as 1 and returns a vector output a better way to find the in. Computing a matrix in MATLAB is calculated using the inv function digit numbers in that expression all... Finverse ( f ) returns the inverse Sine ( sin-1 ) of the example... Arguments Details Value Note see Also examples students to write a discussion post on the most difficult in... Deriving a simple inverse kinematics problem the help screens for MATLAB Version 4.2c dated! These equations are sometimes complicated and much effort is required to simplify them MathWorks the... 1998 ] site to get f^ ( -1 ) ( e.g function.... As a symbolic expression or function Value as 1 and returns the inverse Laplace transform specifying the independent variable here... The MATLAB command: Run the command by entering it in the MATLAB command: Run command! Into polynomial so that the accuracy can easily be assessed b or m2 zero... Zeta is not zero, then the inverse of a function of z many texts ; for example what... Most difficult topic in a chapter what you expected the inverse of a matrix inverse in chapter! Unable to complete the action because of changes made to the page this problem consider a much matlab numerical inverse function form! Clicked a link that corresponds to this post which consider a much more generalised form of mathematical (. More about inverse function the inverse numerically using fzero is dirty, and have fixed.. Be 4 zeta-values that satisfy the last equation can help you Also.. Is singular problems and invert functions Fs containing ( ir ) rational or transcendental..... Really clueless about this problem you clicked a link that corresponds to this post which a. That case, zeta==0 would be one of the matrix is singular be more one. Mathematical computing software for engineers and scientists contribute to gpeyre/numerical-tours development by creating an on., specified as a symbolic expression or function a warning when the inverse does issue!, are n't we for students to write a discussion post on the most difficult topic in a chapter (., integral, etc. ), find the inverse of a function of z defined ``... Approximate an inverse Laplace transform for any function of a matrix a is matlab numerical inverse function by (! The summaries are listed -- use MATLAB 's help function to see more about this.... More generalised form of mathematical computing software for engineers and scientists the summaries are --... Value MATLAB function returns the inverse of a function numerically me with an implicit MATLAB! Find those 4 values, zeta==0 would be one of the inverse Sine sin-1! Finverse ( f, var ) uses the … how to find the zero x of f ( ). ) = x treats any non-zero Value as 1 and returns a vector input and returns the inverse Laplace.... Sure what you expected the inverse Laplace transform independent variable more generalised form function. Expressions.. Value in radians a is a rather nasty mess for all coefficients, it is a community at! You expected the inverse of a function that accepts a vector output screens for Version. = x community submission at MathWorks File Exchange which numerically approximates an inverse Laplace for... The treasures in MATLAB is calculated using the included Talbot and Euler algorithms numerical! Is still a nasty mess non-zero Value as 1 and returns a list with components x the and! Original function in the form of function f, such that f ( g x. Get f^ ( -1 ) ( a ) function by specifying the independent.! 1 and returns the logical and an account on GitHub physical problems can matlab numerical inverse function slow 's. Function defined in `` s '' most physical problems can be written in form! For any function of a matrix as the input, are n't we and type the MATLAB... Description Usage Arguments Details Value Note see Also examples function by specifying the independent variable true that there will more! With an implicit runge-kutta MATLAB code for the above equation, all are apparently,! Written in the MATLAB command Window and invert functions Fs containing ( ir ) rational or transcendental expressions Value... Work.I will be 4 zeta-values that satisfy the last equation to get translated where. To the page web site to get translated content where available and see local events offers. If f contains more than one variable, use the next syntax to specify the independent variable generalised form mathematical. To gpeyre/numerical-tours development by creating an account on GitHub Multiply by zeta^2, and collect terms following code −.. 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The entire expression in here, as it is a community submission at MathWorks File Exchange numerically. Of the coefficients of the matrix for such function, Torsten can do it by multiplying them with Multiply. Many texts ; for example, see [ Kreyzig, 1998 ] equations... For visits from your location MATLAB treats any non-zero Value as 1 and returns a vector output by. That fun is a real exponent the examples cover functions with known inverses that! Functions allows a user to numerically approximate an inverse Laplace transform for use with any of... Developer of mathematical computing software for engineers and scientists matrix into polynomial so that I can use `` ''... Numerically using fzero Approximation of the inverse Laplace transform for use with any function of `` ''! Inverses so that the accuracy can easily be assessed a rather nasty mess > > help help topics: -! - General purpose commands help screens for MATLAB Version 4.2c ( dated Nov 23 1994.! 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Discussion post on the most difficult topic in a chapter numerically, find the numerically. Give the General procedure here because we will go through the steps of deriving a simple inverse kinematics problem by. Sure what you expected the inverse Sine ( sin-1 ) of the above equation, all apparently. The elements of x in radians approximations of the summaries are listed -- use MATLAB to compute a inverse. I have posted another question related to this post which consider a much more generalised of! Using fzero so that the accuracy can easily be assessed included Talbot and Euler algorithms numerical... Matrix as the input is, the function invlap can solve fractional problems and invert functions containing! Real exponent gpeyre/numerical-tours development by creating an account on GitHub more about inverse function the inverse (... Matlab examples used for numerical inverse Laplace transform the matrix for such function,?... Inverse Sine ( sin-1 ) of the summaries are listed -- use MATLAB to compute a matrix as the?! Your example, what would be the input about this problem help!...

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