Lab Manual:1D Math

You can do some basic manipulations of your 1D vectors by using 1dtranspose and 3dcalc in concert.

Your standard .1D vector is a big long column. 3dcalc only works on rows, so you need to first transpose your .1D vector using 1dtranspose.

Example:

 1dtranspose somevector_b.1D somevector_b_tp.1D

 1dtranspose somevector_a.1D somevector_a_tp.1D

This will transpose your vector file somevector_a.1D and somevector_b.1D and save the transposed copies as somevector_a_tp.1D & somevector_b_tp.1D.

Now you can do some fun math using 3dcalc.

e.g.

 3dcalc -a somevector_a_tp.1D -b somevector_b_tp.1D -expr '(2*a - b)' -prefix somevector_2a-b_tp.1D

This multiplies somevector_a by 2 and substracts somevector_b.

Next retranspose your final vector and you have a cool new vector .1D file you can use in your regressions.

 1dtranspose somevector_2a-b_tp.1D somevector_2a-b.1D