cubic_secant2 cubic_secant2 Use the secant method to search for a root of the cubic function. F(1) = -1 F(2) = 5 {Undefined function or variable 'cubic2'. Error in cubic_secant2>@(x)cubic2(x) Error in secant (line 7) c = ( a * f(b) - b * f(a) ) / ( f(b) - f(a) ); Error in cubic_secant2 (line 16) [ a, b, it ] = secant ( @(x)cubic2(x), a, b, xtol, ftol, itmax ); } cubic_secant2 cubic_secant2 Use the secant method to search for a root of the cubic function. F(1) = -1 F(2) = 5 r = 12.4282 2: Estimated convergence rate = 12.4282 r = 0.0122 3: Estimated convergence rate = 0.0121683 r = 66.7313 4: Estimated convergence rate = 66.7313 r = 1.4921 5: Estimated convergence rate = 1.49207 r = 1.6206 6: Estimated convergence rate = 1.62055 r = 1.6004 7: Estimated convergence rate = 1.60043 After 7 iterations: F(1.32472) = -3.22853e-13 it <= itmax? true |a-b| <= xtol? true |f(b)| <= ftol? true diary off cubic_secant2 cubic_secant2 Use the secant method to search for a root of the cubic function. F(1) = -1 F(2) = 5 2: Estimated convergence rate = 12.4282 3: Estimated convergence rate = 0.0121683 4: Estimated convergence rate = 66.7313 5: Estimated convergence rate = 1.49207 6: Estimated convergence rate = 1.62055 7: Estimated convergence rate = 1.60043 After 7 iterations: F(1.32472) = -3.22853e-13 it <= itmax? true |a-b| <= xtol? true |f(b)| <= ftol? true diary hump_secant2.txt