hamming(L) function showing error

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119004180 Siddharth S 2018-7-2

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评论： dpb 2018-7-3

I have Matlab R2018a version. The hamming window function shows error. This is what I typed:

hamming(64)
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 '.*'.
Error in SD>@(N)(0.54-0.46*cos(2*pi*[0:N-1].'/(N-1)))

I checked my current software and found I have signal processing toolbox installed in the version. I checked the same hamming(L) function in R2016b and it did not show any errors.

How to rectify this error??

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119004180 Siddharth S 2018-7-3

Thanks dpb!.. I checked and found that the anonymous function hamming=@(N)(0.54-0.46*cos(2*pi*[0:N-1].'/(N-1)))... seems to have some error, because i tried hamming(L) function after clearing the previous anonymous function from the workspace and the hamming function worked fine. Thanks for the input!

dpb 2018-7-3

在 MATLAB Online 中打开

Ah! I thought perhaps TMW had tried to get clever in the Toolbox by making dynamic-assigned functions or the like.

But,

hamming=@(N)(0.54-0.46*cos(2*pi*[0:N-1].'/(N-1)));

works as written here; it's within double-precision roundoff of the result of the builtin function so not sure what went wrong; it isn't obvious from the info available certainly.

I'm now guessing that

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