[R] data.frame error using sem package

2006-06-28 Thread Patrick Bedard
Hi there, I just saw your question on the help list and tough you could help me with some start-up info I just downloaded the R project software to try running SEM analysis and I also downloaded the SEM package. But it just sits there on the desktop and R does not know where it is...I canĀ¹t

[R] data.frame error using sem package

2005-10-06 Thread Suzanne Witt
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. The error message: Error in

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

[R] data.frame error using sem package

2005-10-06 Thread Suzanne Witt
I am trying to use sem to measure effective connectivity among four brain regions. I have pasted the code that I am trying to run since that seems easier than trying to come up with another example. The input data is time series data taken from SPM; they are each 1x121 columns of numbers.

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

2005-10-06 Thread John Fox
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Suzanne Witt Sent: Thursday, October 06, 2005 2:55 PM To: r-help@stat.math.ethz.ch Subject: [R] data.frame error using sem package I am trying to use sem to measure