PCA problem

. However, I

whenever I try to pipe the r.covar output file into
the eigensystem module using
      m.eigensystem < inputfile
I get the error message "This command must be run
interactively". I also get the same error message
when I try to pipe directly from r.covar to
m.eigensystem using
(echo 3: r.covar map.1,map.2,map.3) | m.eigensystem

Is there some way of being able to input the (often
long) covariance matrix into m.eigensystem, without
having to type in all of the values manually?

Thanks
Lesley-Ann Dupigny.

Yes, run r.covar, select the output with your mouse,
run m.eigensystem interactively,
and paste the covar matrix.

Not too elegant ...

Agus