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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philippe goldin
March 28, 2004 09:01PM
Greetings Bob (aka Zorkon):
Thank you for the quick reply.

I just compared the output of waver -peak 1 with a variety of inputs as follows:

0 0 0 0 1 0 0 0 0 0
0 0 0 0 1 1 0 0 0 0
0 0 0 0 1 1 1 0 0 0

the resultant peak values of the wavered reference function are:
1.0
1.75
2.2

for a longer string of 1s, i also got 2.7 as you mentioned.

The reason i tried -peak 1 is to put the resultant fit coefficient in a range that could then be computed as percent signal change using Doug Ward's method to compute percent signal change which he outlined a while ago on the message board. However, is it necessary to constrain the height of the reference function when convovled with -WAV or -GAM when the intention is to convert the 3dDeconvolve output to % signal change?

Please transform Zorkon the Pessimal to Gertrude the Optimal !!!

philippe
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Subject Author Posted

waver

philippe goldin March 28, 2004 08:26PM

Re: waver

bob cox March 28, 2004 08:33PM

Re: waver

philippe goldin March 28, 2004 09:01PM

Re: waver

rick reynolds March 29, 2004 08:09AM