Re: [R] data.frame error using sem package

2005-10-06 Thread Uwe Ligges
Suzanne Witt wrote: I keep getting this error when I try to use the sem package. I and another person who has successfully used the sem package for similar analysis (fMRI effective connectivity) cannot figure out what is wrong with my code. I would appreciate any suggestions. It is

Re: [R] data.frame error using sem package

2005-10-06 Thread John Fox
Dear Suzanne, Take a look at your model specification: p.ram [,1][,2][,3] [1,] LM1 - LSMA LM1 - LSMA NA [2,] LSMA - RSMA LSMA - RSMA NA [3,] RSMA - RM1 RSMA - RM1 NA [4,] LSMA - LSMA LSMA - LSMA NA [5,] RSMA - RSMA RSMA - RSMA NA [6,] RM1 - RM1