MATLAB: What is the error

Question

when i run my program and try to get product of vector matrix error message appear

</matlabcentral/answers/uploaded_files/23122/Capture.PNG> but when i clear and try prod function there is no error

Answer 1

When you get the error, type this in the Command Window:

which prod -all

You may have a variable named ‘prod’ that is ‘overshadowing’ the MATLAB prod function.

If one (likely the first) in the list that returns in the Command Window is:

prod is a variable.

That is the problem. Rename that variable to something other than ‘prod’ and the problem will not recur.