search for: byclass

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2012 Aug 27
2
randomLCA
...rameter are estimated using randomLCA? For examples, model "dentistry.lca2random" estimate 1 scale (or variance, b_j) parameter and 2 position parameters (a_cj)? Doesn't it? Do I need at least 4 diagnostic tests for such a model? What happens if I specify options blocksize and byclass? How many diagnostic tests (or rater) I need? Extract from see "randomLCA examples", by Ken Beath. > dentistry.lca2random <- randomLCA(dentistry[, + 1:5], freq = dentistry$freq, initmodel = dentistry.lca2, + nclass = 2, random = TRUE, quadpoints = 31, + probit = TRUE) Thank you...
2009 Oct 13
2
splitting dataframe, assign to new dataframe, add new rows to new dataframe
Hi, all, My objective is to split a dataframe named "cmbine" according to the value of "classes". After the split, I will take the first instance from each class and bin them into a new dataframe, "df1". In the 2nd iteration, I will take the 2nd available instance and bin them into another new dataframe, "df2". >cmbine$names apple tiger pencil chicken