Faltung command

AFNI Message Board
1

Dear AFNI experts,

I am running a PPI analysis, but when I run the following command:

3dTfitter -RHS seed_BOLD.1D -FALTUNG GAM.1D seed_neuro.1D 012 0 \

the output file seed_neuro.1D is actually a 3D file, with the following structure:

<AFNI_3D_dataset

self_idcode = …

ni_type = “456*float”

etc-…

This is quite strange, since the same scripts worked for my colleagues in my lab.
I have checked my input 1D file, and they seem legit.
My afni version is 19.1.12

Any idea on why and how to fix this issue?

Thanks.

2

Hi Giono,

That is typical behavior. It is more surprising that your colleagues would be getting something different.

I expect the next line of the file (after ni_type = “456*float”) reads (# ni_dimen = “1,1,1”), meaning the 3D aspect of the file is actually 1x1x1, making it a single voxel, 456 time point dataset.

Are you having trouble working with the file?

  • rick
3

Hi Rick,

Thanks.

Yes, I do have problems to work with it, since next command is:

1deval -a seed_neuro.1D -b GAM.1d -expr ‘a*b’

where a is the output of the FALTUNG and this produces an output that is a file with a unique 0 instead of 456 values.

4

Run 1dtranspose after 3dTfitter.

Consider the sample analysis under AFNI_data6/FT_analysis/PPI.
Those commands are in cmd.ppi.2.make.regs (search for 3dTfitter).

Just let me know if you run into any more difficulties.

  • rick
5

This worked fine! Thank you!

Giovanni