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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jtang
March 01, 2017 08:24PM
Hello，

I want to use 3dTcorrMap to calcualte the global connectivity.

Given that mixed positive and negative value could cancel each other( eg average 0.1 and -0..1). so I want to average positive correaltion and negative correlation separately.

3dTcorrMap -input input_data -mask mask_data -Cexpr 'step(z-0)*z' output_data ( for Zmean)
3dTcorrMap -input input_data -mask mask_data -Cexpr 'step(r-0)*r' output_data (for rmean)

Is this right for postive correlation?

how to analysis the negative correlation?

Thank you so much!

Best,

jinsong
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Subject Author Posted

3dTcorrMap output for “positive correlation” or “negative correlation”

jtang March 01, 2017 08:24PM

Re: 3dTcorrMap output for “positive correlation” or “negative correlation”

gang March 02, 2017 09:29AM

Re: 3dTcorrMap output for “positive correlation” or “negative correlation”

jtang March 02, 2017 01:27PM

Re: 3dTcorrMap output for “positive correlation” or “negative correlation”

gang March 03, 2017 09:26AM

Re: 3dTcorrMap output for “positive correlation” or “negative correlation”

jtang March 07, 2017 06:48PM