[R] sem is not "taking" the model

[John Smith]

Thanks a lot - I did not realize one had to hit "return" after running it (or leave an extra empty line below it).
It works!
Dimitri

----- Original Message ----
From: John Fox <jfox at mcmaster.ca>
To: John Smith <ld7631 at yahoo.com>
Cc: r-help at stat.math.ethz.ch
Sent: Wednesday, April 11, 2007 5:20:11 PM
Subject: Re: [R] sem is not "taking" the model


Dear Dimitri,

This works find for me. It's not possible to know what you did wrong
without more information, but one guess (probably wrong) is that you
didn't enter a blank line to exit from specify.model(), which simply
uses scan() to read the model:

> library(sem)
> model1 <- specify.model()
1: NECESSITY -> n1, NA, 1
2: NECESSITY -> n2, lam_nec_2, NA
3: NECESSITY -> n3, lam_nec_3, NA
4: NECESSITY -> n4, lam_nec_4, NA
5: FRUGALITY -> f1, NA, 1
6: FRUGALITY -> f2, lam_frug_2, NA
7: FRUGALITY -> f3, lam_frug_3, NA
8: TIME -> t1, NA, 1
9: n1 <-> n1, theta_n1, NA
10: n2 <-> n2, theta_n2, NA
11: n3 <-> n3, theta_n3, NA
12: n4 <-> n4, theta_n4, NA
13: f1 <-> f1, theta_f1, NA
14: f2 <-> f2, theta_f2, NA
15: f3 <-> f3, theta_f3, NA
16: t1 <-> t1, NA, 0.414
17: NECESSITY <-> NECESSITY, phi_NN, NA
18: FRUGALITY <-> FRUGALITY, phi_FF, NA
19: TIME <-> TIME, phi_TT, NA
20: NECESSITY <-> TIME, phi_NT, NA
21: NECESSITY <-> FRUGALITY, phi_NF, NA
22: FRUGALITY <-> TIME, phi_FT, NA
23: 
Read 22 records
> 

Regards,
John

On Wed, 11 Apr 2007 11:41:25 -0700 (PDT)
John Smith <ld7631 at yahoo.com> wrote:
> A strange problem with sem:
> 
> I downloaded the sem library and then, I specified my simple
> measurement model (below). I highlighted it and ran it. It ran, but
> it did NOT tell me "22 lines read". And nothing works after that - it
> looks like it runs, but it does not produce anything...
> Did I make a mistake somewhere in the model? (notice, TIME has only 1
> indicator - t1, and I fixed t1's error variance at 0.414.)
> Thank you!
> 
> model1 <- specify.model()
> NECESSITY  -> n1,  NA,  1
> NECESSITY -> n2,  lam_nec_2, NA 
> NECESSITY -> n3,  lam_nec_3, NA
> NECESSITY -> n4,  lam_nec_4, NA
> FRUGALITY  -> f1,  NA,  1
> FRUGALITY  -> f2,  lam_frug_2, NA
> FRUGALITY  -> f3,  lam_frug_3, NA
> TIME   -> t1,  NA,  1
> n1  <-> n1,  theta_n1, NA
> n2  <-> n2,  theta_n2, NA
> n3  <-> n3,  theta_n3, NA
> n4  <-> n4,  theta_n4, NA
> f1  <-> f1,  theta_f1, NA
> f2  <-> f2,  theta_f2, NA
> f3  <-> f3,  theta_f3, NA
> t1  <-> t1,  NA,  0.414
> NECESSITY <-> NECESSITY, phi_NN, NA
> FRUGALITY <-> FRUGALITY, phi_FF, NA
> TIME  <-> TIME,  phi_TT, NA
> NECESSITY <-> TIME,  phi_NT, NA
> NECESSITY <-> FRUGALITY, phi_NF, NA
> FRUGALITY <-> TIME,  phi_FT, NA
> 
> 
>        
>
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--------------------------------
John Fox
Department of Sociology
McMaster University
Hamilton, Ontario, Canada
http://socserv.mcmaster.ca/jfox/


       
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The fish are biting.