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Sally Czaja posted on Wednesday, May 16, 2007 - 1:32 pm
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Hi I'm running an LCA with continuous indicators (like Ex. 7.9 in the User's Guide). I get an error message (at end) that refers to PARAMETER SPECIFICATION FOR LATENT CLASS REGRESSION MODEL PART ALPHA(C) CLASS#1 What is this variable? where should I be looking in my model to correct this? Thank you. Sally Error message: THE STANDARD ERRORS OF THE MODEL PARAMETER ESTIMATES MAY NOT BE TRUSTWORTHY FOR SOME PARAMETERS DUE TO A NON-POSITIVE DEFINITE FIRST-ORDER DERIVATIVE PRODUCT MATRIX. THIS MAY BE DUE TO THE STARTING VALUES BUT MAY ALSO BE AN INDICATION OF MODEL NONIDENTIFICATION. THE CONDITION NUMBER IS -0.603D-17. PROBLEM INVOLVING PARAMETER 82. |
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You can see what parameter 82 is by asking for TECH1 in the OUTPUT command. |
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Parameter 82 is "alpha(c)". but I don't know what this means. Thanks Sally |
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It is a mean. If this does not help, please send your input, data, output, and license number to support@statmodel.com. |
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