norminv not working

I just added the statistics toolbox to my MATLAB installation. I want to use the norminv function. Today I upgraded from 2011a to 2011b but adding the statistics toolbox.

However, when I call norminv, e.g. norminv(0.5) I get the error message

Undefined function 'stdnormal_inv' for input arguments of type 'double'.

Error in norminv (line 54) inv = m + s .* stdnormal_inv (x);

My guess it is something to do with the path. However, the statistics toolbox is in the path. When I type help norminv I get the help information. When I type which norminv I get

/Users/westland/Documents/MATLAB/norminv.m

which is a bit strange because norminv.m is not in this directory.

Any help would be greatly appreciated.

Answer 1

[Sean de Wolski]

It means that you wrote your own norminv or downloaded a norminv. Rename the norminv at /Users/westland/Documents/MATLAB/norminv.m to something else and then it should work.

which -all norminv

would show the real one too.

[Stephen Westland]

Thanks.

This shows

/Users/westland/Documents/MATLAB/norminv.m

/Applications/MATLAB_R2011b.app/toolbox/stats/stats/norminv.m % Shadowed

I feel a bit stupid. I remember now, trying to write my own norminv.m ages ago. I deleted it and now everything works fine. Many many thanks

Steve

[Sean de Wolski]

Great! Please accept this answer to mark this thread closed.