"Sprand" problem

Question

Atta Oveisi 2012-4-26

I use MATLAB Version 7.8.0.347 (R2009a)

I want to use the "sprand" command, but when I use this two commands below I get conflicting answers.

this one works well:

sprand(100,50,0.1,1e-2);

but this one says that there is an error: sprand(100,50,0.01,1e-2); ??? Error using ==> rand Size vector must be a row vector with real elements.

Error in ==> sprand at 39 i = fix( rand(nnzwanted, 1) * m ) + 1;

Error in ==> sprand at 122 ak = sprand(m,1, nzpc/m);

I am confused. What is the problem?

Answer 1

Wayne King 2012-4-26

Hi Atta, I think perhaps you have some non-MathWorks function on your path that precedes the MathWorks' version. That line should work in R2009a.

If you enter

>>which rand

Do you get something like the following?

built-in (.../toolbox/matlab/randfun/rand)

Perhaps you have another version of rand() in your installation?

If

>>which rand

does not return the above, either remove the other file from your path, or remove the folder it is located in.