search for: nondriver

...error message and wondering what to do to fix it: Error in solve.default((N[g] - 1) * robustVcov(mod.g, adj.obj = adj.objects[[g]])) : system is computationally singular: reciprocal condition number = 4.52055e-23 2. Second, I want to specify different models for two groups (Drivers vs. Nondrivers), but I want only 1 parameter to be different, while everything else remains the same. Should I just create two files with the model equations? But then how do I use these 2 files as an input to the multigroupModel or sem functions? I tried the following but got the error message {Error in model[,...