Sum(X,dim) doesnot work after I load MAT file

Asked Jan 18 '16 at 16:02

Active Jan 18 '16 at 16:02

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I have a 150x10 matrix X = zeros(150,10). If I do sum(X,2), I get the error "Subscript indices must either be real positive integers or logicals.". Can anyone help me out with that? I checked out the 'sum' function and I don't understand why this simple thing should give me any error.

Even for smaller example like A = [1 3 2; 4 2 5; 6 1 4] and sum(A,2), it gives me the required result in the MATLAB terminal however when I load my ".mat" file which has no previous variable 'A' (So I think it should not create any difference), I get on the same query an error as: "Index exceeds matrix dimensions."

asked Jan 18 '16 at 16:02

Yeshi

Do you have a variable call sum in your workspace? `which sum` – matlabgui Jan 18 '16 at 16:06
The .mat file you load probably contains a variabel of the name `sum`! – Jens Boldsen Jan 18 '16 at 16:07
2

As both matlabgui and Jens have noted, you probably have a variable `sum` that is shadowing the function. Please see note #2 in the duplicate link's answer for more detail. `tl;dr`, use `clear sum` then try again. – rayryeng Jan 18 '16 at 16:12
Yes, Thank you so much! It worked! – Yeshi Jan 18 '16 at 16:16

Sum(X,dim) doesnot work after I load MAT file

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