Dimensions error on paired t-test?

Hi all, I try to perform a paired t-test like that:

a=[1;2;3]
b=[10;20;30]
h = ttest(a,b)

and I get the following error message:

"Dimension argument must be a positive integer scalar within indexing range"

Does anyone know what's wrong?

Thanks, shir

[Adam]

What does

which ttest

show?

[shir shalom]

C:\Program Files\MATLAB\R2013b\toolbox\stats\stats\ttest.m

[Adam]

I can't see how you would get that error in that case. I would suggest using the

dbstop if error

option to see exactly where it is that the error is being thrown from as you may have some overloaded version of a function that gets called by ttest.

[Star Strider]

The which call needs to be:

which ttest -all

to check for overshadowing.

[shir shalom]

It has the same result:

C:\Program Files\MATLAB\R2013b\toolbox\stats\stats\ttest.m

[Adam]

The one that is active (not overshadowed) will always be the result of the simpler call though.

Answer 1

[Star Strider]

Since you’re obviously not overshadowing, see if you have a path problem. The way to solve that is to run these two lines:

restoredefaultpath 
rehash toolboxcache

That should solve path problems. If this doesn’t work, contact MathWorks Technical Support.

[shir shalom]

OMG thank you it helped!!!!! Thank youuuuuuuuuu!!!

[Star Strider]

As always, my pleasure!

[shir shalom]

Hi, you're here?

so apparently I thought it worked cuz the ttest ran well, but my functions started to get weird errors.

when I put my folders first in the "set path", the ttest doesn't work. when I put them last, the ttest works fine, but my functions don't.

is it possible that it's because I moved all my folders to google drive?

please help. Thanks, Shir

[Star Strider]

Yup!

I would keep all user files local in the user file directory (in Windows this is ‘C:\Users\-UserName-\Documents\MATLAB\’ and subdirectories). If you want to upload them to Google Drive to have them available on other computers, do so. I always run my scripts and functions from my local drive and MATLAB directory.

I don’t use Google Drive or other such services, so I have no experience with them. It may be possible to do what you want with Google Drive. I would Contact MathWorks Tech Support to see if what you want to do is an option.

[shir shalom]

I contacted them. Thank you so much.

[Star Strider]

My pleasure.