MATLAB: Not enough input arguments.

numerical integration

Best Answer

You cannot run that code just by clicking on Run. You need to go to the command line and enter

   x0 = rand
   x1 = x0 + rand
   tol = 1e-6
   secantmethod(x0, x1, tol)

Related Solutions

MATLAB: I did not understand the error which is called ‘Error using symengine: Array sizes must match.’ What should i do

Hi Mert,

The Probelm arises in the 3rd iteration. In the 3rd Iteration x1 is size of 3x1 symfun and grad_x1 is size of 9x1 .

so the line

tx1_temp=subs(dif_x1,x1-grad_x1*t);

is throwing error as MATLAB is not able to resolve "x1- grad_x1*t".

So make sure both x1 and grad_x1 are of same size or "x1-grad_x1*t" should make sense like we can subtract 2x2 matrix from 1x2 like this :

syms x1 x2
p = [x1,x2;x2,x1];
t = [x1,x1] - p;

Thanks,

Deepak

MATLAB: Newton Raphson method help

fun = @(x) x^3 + 2*x^2 - 2;
dfun = @(x) 3*x^2 + 4*x ;
function [x1,n] = newton(fun,dfun,x0,tol)
n = 0;
x0 = rand ;  % initial guess
tol = 10^-5 ; % tolerance 
while abs(dx) > tol && n < 50
    x1 = x0-fun(x0)/dfun(x0);
    dx = abs((x1-x0)/x0)
    x0 = x1;
    n = n +1; 
end

You can check the solution using:

fun(x1)

Best Answer

Related Solutions

MATLAB: I did not understand the error which is called ‘Error using symengine: Array sizes must match.’ What should i do

MATLAB: Newton Raphson method help

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