Hello all,I am trying to solve this in command window f = @(X)((x.^3​)-2*(x.^2)​-5*(x-3))*​exp(x); Xn = (1:15)/16; fXn = f(Xn) And i am getting following error: Error using ==> mpower Matrix must be square.

Hello all,I am trying to solve this in command window

f = @(X)((x.^3)-2*(x.^2)-5*(x-3))*exp(x);
Xn = (1:15)/16;
fXn = f(Xn)

And i am getting following error: Error using ==> mpower Please suggest me.(this problem persists only when exponential function is with multiplication sign. ) Matrix must be square.

Answer 1

[Stephen23]

This fixes the error, but only you can check if it is correct:

>> f = @(x)((x.^3)-2*(x.^2)-5*(x-3)).*exp(x);
>> f(1:3)
ans =
    24.465    36.945   180.770

You referred to the wrong variable (check your capitalization: X is not the same as x), and the last multiplication must be element-wise times, not matrix mtimes as you originally used. For more info:

http://www.mathworks.com/help/matlab/matlab_prog/array-vs-matrix-operations.html

[Shivangi Chauhan]

Thanks a lot