.. _ahelp_1ddot:
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1ddot
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.. contents:: :local:

.. codeblock:: none
Usage: 1ddot [options] 1Dfile 1Dfile ...
* Prints out correlation matrix of the 1D files and
their inverse correlation matrix.
* Output appears on stdout.
* Program 1dCorrelate does something similarish.
Options:
one = Make 1st vector be all 1's.
dem = Remove mean from all vectors (conflicts with 'one')
cov = Compute with covariance matrix instead of correlation
inn = Computed with inner product matrix instead
rank = Compute Spearman rank correlation instead
(also implies 'terse')
terse= Output only the correlation or covariance matrix
and without any of the garnish.
okzero= Do not quit if a vector is all zeros.
The correlation matrix will have 0 where NaNs ought to go.
Expect rubbish in the inverse matrices if all zero
vectors exist.
++ Compile date = Jan 21 2021 {AFNI_21.0.05:linux_ubuntu_16_64}