Re: [R] What's wrong with my code ? On 5/19/07, ronggui  wrote: > I try to code the ULS factor analysis descrbied in > ftp://ftp.spss.com/pub/spss/statistics/spss/algorithms/ factor.pdf > # see PP5-6 > > factanal.fit.uls <- function(cmat, factors, start=NULL, lower = 0.005, > control = NULL, ...) > { >   FAfn <- function(Psi, S, q) >   { >     Sstar <- S - diag(Psi) >     E <- eigen(Sstar, symmetric = TRUE, only.values = TRUE) >     e <- E$values[-(1:q)] >     e <- sum(e^2/2) >     e >   } > >   FAgr <- function(Psi, S, q) >   { >     Sstar <- S - diag(Psi) >     E <- eigen(Sstar, symmetric = TRUE) >     L <- E$vectors[, -(1:q), drop = FALSE] >     e <- E$values[-(1:q)] >     gr <- 2*Psi*((L^2)%*%e) >     gr >   } > >   p <- ncol(cmat) >   if(is.null(start)) >     start <- (1 - 0.5*factors/p)/diag(solve(cmat)) >   res <- optim(start, FAfn, >                  FAgr, >           method="L-BFGS-B", >           lower = lower, upper = 1, >           control = c(list(fnscale=1, >           parscale = rep(0.01, length(start))), control), >           q = factors, S = cmat) I forgot to tell that  the code to get "start" and " res <- optim(....)  " if from stats:::factanal.fit.mle. > res > } > > covmat <- > structure(c(1, 0.0920030858518061, 0.053952442382614, -0.0380048634941013, > 0.237986469993129, 0.243144461077282, 0.0920030858518061, 1, > 0.328163804480881, 0.142002180914605, -0.139369611642031, -0.0670944471678571, > 0.053952442382614, 0.328163804480881, 1, 0.267648727315665, -0.0549987508157441, > -0.107488501744669, -0.0380048634941013, 0.142002180914605, 0.267648727315665, > 1, -0.0566976575082817, -0.132943658387513, 0.237986469993129, > -0.139369611642031, -0.0549987508157441, -0.0566976575082817, > 1, 0.352367996102745, 0.243144461077282, -0.0670944471678571, > -0.107488501744669, -0.132943658387513, 0.352367996102745, 1), .Dim = c(6L, > 6L), .Dimnames = list(c("bg2cost1", "bg2cost2", "bg2cost3", "bg2cost4", > "bg2cost5", "bg2cost6"), c("bg2cost1", "bg2cost2", "bg2cost3", > "bg2cost4", "bg2cost5", "bg2cost6"))) > > > > factanal.fit.uls(covmat,2) > $par > bg2cost1 bg2cost2 bg2cost3 bg2cost4 bg2cost5 bg2cost6 > 0.7454829 0.7191459 0.6969019 0.7611750 0.6940870 0.6930580 > > $value > [1] 0.02167674 > > $counts > function gradient >     21     21 > > $convergence > [1] 52 > > $message > [1] "ERROR: ABNORMAL_TERMINATION_IN_LNSRCH" > > -- > Ronggui Huang > Department of Sociology > Fudan University, Shanghai, China > --  Ronggui Huang Department of Sociology Fudan University, Shanghai, China ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.