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?try On Wed, 19 Jul 2006, Robert Mcfadden wrote:> Dear All, > > I wrote a program and there is a loop. At each iteration I use maximum > likelihood factor analysis (?factanal). Output of factor analysis I use > later (in this loop). Unfortunately from time to time I get an error message > (I paste it below) and everything is stopped. Is it possible to write a > condition that if error appears in factor analysis (FA), change input data > for FA and do it again? Example > > > > for (i in 1:1000){ > > FA<-factanal(data,factor=3) > > If error appears change data to data2 and do factor analysis again > > #rest of the program > > ............ > > ............ > > } > > > > Best, > > Robert > > > > Error in optim(start, FAfn, FAgr, method = "L-BFGS-B", lower = lower, : > > L-BFGS-B needs finite values of 'fn' > > In addition: Warning message: > > NaNs produced in: log(x) > > > > > > > > > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at 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. >-- Brian D. Ripley, ripley at stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595
Robert, try try(). Andrew. On Wed, Jul 19, 2006 at 10:27:07AM +0200, Robert Mcfadden wrote:> Dear All, > > I wrote a program and there is a loop. At each iteration I use maximum > likelihood factor analysis (?factanal). Output of factor analysis I use > later (in this loop). Unfortunately from time to time I get an error message > (I paste it below) and everything is stopped. Is it possible to write a > condition that if error appears in factor analysis (FA), change input data > for FA and do it again? Example > > > > for (i in 1:1000){ > > FA<-factanal(data,factor=3) > > If error appears change data to data2 and do factor analysis again > > #rest of the program > > ............ > > ............ > > } > > > > Best, > > Robert > > > > Error in optim(start, FAfn, FAgr, method = "L-BFGS-B", lower = lower, : > > L-BFGS-B needs finite values of 'fn' > > In addition: Warning message: > > NaNs produced in: log(x) > > > > > > > > > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at 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.-- Andrew Robinson Department of Mathematics and Statistics Tel: +61-3-8344-9763 University of Melbourne, VIC 3010 Australia Fax: +61-3-8344-4599 Email: a.robinson at ms.unimelb.edu.au http://www.ms.unimelb.edu.au