I have just started using the SEM package in R, so I'm not sure I'm doing everything right, but I keep getting an error concerning startvalues and I can't figure out how to fix it. Is anyone willing to read over my code and help me out??? Please email me if you are willing to look at my code and I will send it to you. Thank you so much, and Happy New Year! cathy ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Catherine M. Stein Research Assistant, Tuberculosis Research Unit Doctoral Candidate in Genetic Epidemiology Department of Epidemiology and Biostatistics Case Western Reserve University office: (216)368-0875 or (216)778-1378 e-mail: kasia at darwin.cwru.edu, or cmstein at cwru.edu EPBI Student Resources Page: http://hal.epbi.cwru.edu/stures/ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Dear Catherine, The most common user error that I've encountered is the omission of error-variance terms from the model (for both measurement errors and structural disturbances). If this isn't the source of your difficulty, then send me the code along with an explanation of what you're trying to do (e.g., a path diagram) and I'll take a look at it. I'm sorry that you're experiencing problems. John At 12:49 PM 1/2/2004 -0500, Catherine Stein wrote:>I have just started using the SEM package in R, so I'm not sure I'm doing >everything right, but I keep getting an error concerning startvalues and I >can't figure out how to fix it. Is anyone willing to read over my code >and help me out??? Please email me if you are willing to look at my code >and I will send it to you. > >Thank you so much, and Happy New Year! > >cathy----------------------------------------------------- John Fox Department of Sociology McMaster University Hamilton, Ontario, Canada L8S 4M4 email: jfox at mcmaster.ca phone: 905-525-9140x23604 web: www.socsci.mcmaster.ca/jfox
Can you get a simlified model to work? If yes, have you tried adding one parameter at a time, using previous parameters as starting values? hope this helps. spencer graves Catherine Stein wrote:>I have just started using the SEM package in R, so I'm not sure I'm doing >everything right, but I keep getting an error concerning startvalues and I >can't figure out how to fix it. Is anyone willing to read over my code >and help me out??? Please email me if you are willing to look at my code >and I will send it to you. > >Thank you so much, and Happy New Year! > >cathy > >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >Catherine M. Stein >Research Assistant, Tuberculosis Research Unit >Doctoral Candidate in Genetic Epidemiology >Department of Epidemiology and Biostatistics >Case Western Reserve University >office: (216)368-0875 or (216)778-1378 >e-mail: kasia at darwin.cwru.edu, or cmstein at cwru.edu > >EPBI Student Resources Page: >http://hal.epbi.cwru.edu/stures/ >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > >______________________________________________ >R-help at stat.math.ethz.ch mailing list >https://www.stat.math.ethz.ch/mailman/listinfo/r-help > >