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# Why doesn't this matlab code work?!

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Aryo Aryanapour on 19 Apr 2021
Commented: Aryo Aryanapour on 20 Apr 2021
>> x = -5:1:5;
>> y = exp(x)*(x.^3-5*x.^2+5*x+1);
Error using *
Incorrect dimensions for matrix multiplication. Check that the number of columns in the first matrix
matches the number of rows in the second matrix. To perform elementwise multiplication, use '.*'.
Related documentation
>> plot(x,y)
Unrecognized function or variable 'y'.
thank you
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### Accepted Answer

the cyclist on 20 Apr 2021
You missed a spot where you needed an element-wise operation, multiplying the exp(x) by the other term:
x = -5:1:5;
y = exp(x).*(x.^3-5*x.^2+5*x+1);
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Aryo Aryanapour on 20 Apr 2021
Thank you very much
it works now

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