Message-ID: <1110379956.422f0db40fe4a@webmail.biologia.ufrj.br>
Date: 2005-03-09T14:52:36Z
From: André Tavares?==?ISO-8859-1?Q?Corrêa Dias
Subject: Structural equation models with R
Hello useRs,
I`m running structural equation models with R, but for one of my models the
below error message apears. I`m trying to change startvalues but without
success. The manual for sem package did not help me. Does anyone knows how to
change startvalues for iteration in sem package? Or it can be another problem
with the model?
Error in startvalues(S, ram, debug = debug, tol = start.tol) :
subscript out of bounds
The model (with three latent variables: 'reg','folha','solo'))
model.com=matrix(c(
'ridos>dendos', 'a1', NA,
'ridos>reg', 'a2', NA,
'ridos>folha', 'a3', NA,
'ridos>solo', 'a4', NA,
'ridos>raiz', 'a5', NA,
'dendos>litter', 'a6', NA,
'dendos>reg', 'a7', NA,
'litter>reg', 'a8', NA,
'folha>reg', 'a9', NA,
'solo>reg', 'a10', NA,
'raiz>reg', 'a11', NA,
'raiz>solo', 'a12', NA,
'folha>solo', 'a13', NA,
'reg>denjov', 'l1', NA,
'reg>riqjov', 'l2', NA,
'folha>nfolha', 'l3', NA,
'folha>pfolha', 'l4', NA,
'solo>nsolo', 'l5', NA,
'solo>psolo', 'l6', NA,
'riqjov<>riqjov', 'e1', NA,
'denjov<>denjov', 'e2', NA,
'litter<>litter', 'e3', NA,
'riqdos<>riqdos', 'e4', NA,
'dendos<>dendos', 'e5', NA,
'raiz<>raiz', 'e6', NA,
'nsolo<>nsolo', 'e7', NA,
'psolo<>psolo', 'e8', NA,
'nfolha<>nfolha', 'e9', NA,
'pfolha<>pfolha', 'e10', NA,
'reg<>reg', NA, 1,
'solo<>solo', NA, 1,
'folha<>folha', NA, 1),
ncol=3, byrow=TRUE)
obs.vars.com=c('riqjov','denjov','litter','riqdos','dendos','raiz',
'nsolo','psolo','nfolha','pfolha')
sem.com=sem(model.com,S.com,30,obs.vars.com)
-------------------------------
Andr? Tavares Corr?a Dias
Laborat?rio de Ecologia Vegetal
Departamento de Ecologia - IB
Universidade Federal do Rio de Janeiro
Ilha do Fund?o, CCS
Rio de Janeiro, RJ. Brasil
CEP 21941-590 CP 68020
Tel. (21)2562-6377