or why “… matrix inversion is singular”?
To test your predictors, use:
Sources\collinearity-diagnostics-matlab
ne_check_sdm_for_collinearity.m
Based on: http://www.subcortex.net/research/code/collinearity-diagnostics-matlab-code by Brian Lau
Developed by Jurriaan Born
http://support.brainvoyager.com/available-tools/53-user-developed-tools/238-brainvoyager-analysis-predictor-tool.html