afni.nimh.nih.gov

Hi Gang,

I try the 1dSVAR.R on my data with the specification matrix for instantaneous effects as follows:

A B C D
A 0 NA 0 0
B NA 0 0 0
C NA NA 0 NA
D 0 0 NA 0

However, I got the following error message:

No. 1 specification matrix for instantaneous effectss file name: test_IE
[1] "No. 1 file just read in: test_IE"
Error in solve.default(infgamma) :
Lapack routine dgesv: system is exactly singular

Kindly help.

Phoebe.