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visits member for 2 years, 8 months
seen Dec 20 '11 at 11:22
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Aug
17
comment Is there a package in R which implements the weighted maximum likelihood method?
I write it in R and Java. Can send you the code but it's ugly... Not a Newton Raphson but a "split half" search.
Jan
5
comment An R function for performing searches
for this purpose you can see the stringr package of H. Wickam
Dec
4
comment When do you consider a variable is a latent variable?
Thanks i see what you mean... But my goal is to have statistics rules. The complexity you talk about can be seen in econometrics problems which use classical approach.
Dec
4
comment When do you consider a variable is a latent variable?
i fix questions with examples...
Oct
14
comment Classification after factor analysis
Yes i think to cluster analysis rather than classifcation.
Oct
5
comment Recreating R's hist function's bin counting
see stackoverflow.com for R question
Sep
28
comment Differences between tetrachoric and Pearson correlation
Thanks a lot. Great word. It will be helpful for me.
Sep
27
comment Differences between tetrachoric and Pearson correlation
Thanks for explanation and references. But what i would know is when values obtained from tetrachoric are slightly different of person coefficient. Because they're supposed to be close. Indeed, in many programs, for estimation, Pearson r are used as start values for algorithm which compute tetrachoric correlation.
Sep
26
comment Differences between tetrachoric and Pearson correlation
matrix is 5000 x 300. Software is SAS. PROC CORR and PLCORR. Convergence was not reached so the number of iterations have been changed to 100 iterations.
Sep
16
comment Statistical inference when the sample “is” the population
sorry. I have difficulties to understand how i would compute permutations and what conclusions I'll be able to made for them.
Sep
16
comment Statistical inference when the sample “is” the population
Thanks a lot for your answers.
Sep
14
comment Statistical inference when the sample “is” the population
thanks for change the title Jeromy. better this way.
Sep
8
comment Classification after factor analysis
Thanks for your answer and reference. I will check differents models and do cross validation. Bayesian is a good idea.
Sep
8
comment Classification after factor analysis
I'll come back with results.
Sep
8
comment Classification after factor analysis
Thanks. Nice idea cross classification.
Sep
7
comment Factor analysis of questionnaires composed of Likert items
Thanks a lot... Very complete...