AFNI Message Board

Dear AFNI users-

We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:

https://discuss.afni.nimh.nih.gov

Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.

The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.

Sincerely, AFNI HQ

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Vince
February 06, 2006 11:05AM
I would like to do just a simple linear fit of some data, but keep the intercept=0. I've tried 3dNLfim like this:

%> 3dNLfim -input mydata+orig -mask mymask+orig -signal Null -noise Linear -nabs -nconstr 0 0 0 -bucket 2 mybuc -brick 0 ncoef 0 'Intercept' -brick 1 ncoef 1 'Slope'

But the intercept brick is NOT identically zero. That is, the nabs and nconstr don't seem to work.

I was also wondering what exactly the 3dTstat -slope flag does - what does "mean slope" mean?
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Subject Author Posted

fit linear with intercept=0

Vince February 06, 2006 11:05AM

Re: fit linear with intercept=0

Dan Rowe February 06, 2006 11:35AM

Re: fit linear with intercept=0

Vince February 06, 2006 11:44AM

Re: fit linear with intercept=0

Dan Rowe February 06, 2006 12:09PM

Re: fit linear with intercept=0

Vince February 06, 2006 01:00PM