'grp2idx' error in matlab 2011b

I receive the "Undefined function 'grp2idx' for input arguments of type 'double'." error while using svmtrain() in 2011b. Incidentally, I also have matlab2010a but observed that I do not get this error while running the command with the 2010a version. I noted that the statistics toolbox folder is present in both versions. What is the problem and how do I overcome it?

thanks

Vivek

Answer 1

[Walter Roberson]

It should exist.

Please check

which -all grp2idx

on both systems. On my R2008b system it shows up as toolbox/stats/grp2idx.m

[vivek n]

Thank you Walter. I got " 'grp2idx' not found." for my 2011b version, and "C:\Program Files\MATLAB\R2010a\toolbox\stats\grp2idx.m" for my 2010a version.

I dug up the path to gr2idx.m in my 2011b folder and found it at "C:\Program Files\MATLAB\R2011b\toolbox\stats\stats". Unlike its 2010a counterpart, the '2011b\toolbox\stats' folder contains 'classreg','stats', and 'statsdemos' folders. I tried re-installing the 2011b, but it didn't help.

How should I proceed?

Vivek

[Tom Lane]

Try explicitly adding the required directories to your path

addpath([matlabroot '/toolbox/stats/stats'])

addpath([matlabroot '/toolbox/stats/statsdemos'])

addpath([matlabroot '/toolbox/stats/classreg'])

[vivek n]

Thank you Tom. This fix worked, as expected. Was this bug already known? My concern is whether 2011b could throw up other such unexpected errors because of its file organization. Is there an alternative,more stable version of 2011b?

[Tom Lane]

I'm not aware of any bug in the product that would cause this. It appears to be either an installation problem, or some phenomenon that caused your pre-R2011b path to be saved and used without update in R2011b.

[vivek n]

I did not get any errors during installation. To verify, I completely uninstalled all versions of Matlab, downloaded the 64-bit version of 2011b from Mathworks a short while ago (2/13/2012), and re-installed it from scratch. The installation was successful this time too. But I still get the same error as before ("Undefined function 'grp2idx' for input arguments of type 'double'.")....

[Tom Lane]

Would you try

which pathdef -all

and let me know what you see?

[vivek n]

I got the result below:

..\My Documents\MATLAB\pathdef.m

C:\Program Files\MATLAB\R2011b\toolbox\local\pathdef.m % Shadowed

Answer 2

[wahyu]

i have the same problem too,, then, i search in google grp2idx.m, then i saved it, alhamdulillah my svmtrain could work well after that :D may be my instalation is not complette.