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.

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Shivangi Chauhan 2016-2-25

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评论： Shivangi Chauhan 2016-2-25

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.

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Answer 1

Stephen23 2016-2-25

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编辑：Stephen23 2016-2-25

在 MATLAB Online 中打开

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