search for: 28mass

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Is possible, on biological grounds, suggest to fitdistr (MASS library) that the estimated parameters must be between two values?
2008 Oct 30
1
Is possible, on biological grounds, suggest to fitdistr (MASS library) that the estimated parameters must be between two values?
...ue mean=132.8, sd=25.9, far from the true values. Can I, on biological grounds, suggest to fitdistr that the mean must be a value, for example, between 90 and 110? Thanks David -- View this message in context: http://www.nabble.com/Is-possible%2C-on-biological-grounds%2C-suggest-to-fitdistr-%28MASS-library%29-that-the-estimated-parameters-must-be-between-two-values--tp20243667p20243667.html Sent from the R help mailing list archive at Nabble.com.
weird behavior of drop1() for polr models (MASS)
2008 Sep 30
2
weird behavior of drop1() for polr models (MASS)
...stimated parameters are nicely attributed to the right term, however in house.plr2, only 2 of the 4 terms are evaluated. I am using R version 2.7.2 (2008-08-25) i386-pc-mingw32, and MASS_7.2-44. -- View this message in context: http://www.nabble.com/weird-behavior-of-drop1%28%29-for-polr-models-%28MASS%29-tp19742120p19742120.html Sent from the R devel mailing list archive at Nabble.com.
discriminant analysis with lda(MASS)
2007 Jun 18
0
discriminant analysis with lda(MASS)
...t? Here is the code for the plot: plot(x, panel = panel.lda, cex = 0.7, dimen=1, xlab = "LD1", ylab = "LD2") Help on any or all of these questions will be greatly appreciated! Silvia. -- View this message in context: http://www.nabble.com/discriminant-analysis-with-lda%28MASS%29-tf3941130.html#a11178433 Sent from the R help mailing list archive at Nabble.com.
Re lative novice: Working with fitdistr(MASS): 3 questions
2008 Sep 22
0
Re lative novice: Working with fitdistr(MASS): 3 questions
...n't know is how significant such skewness is for the overall distribution. How can I assess this, or can I assess this, using fitdistr (or some other function I haven't found yet)? Thanks Ted -- View this message in context: http://www.nabble.com/Relative-novice%3A-Working-with-fitdistr%28MASS%29%3A-3-questions-tp19610812p19610812.html Sent from the R help mailing list archive at Nabble.com.
Re lative Novice ? "Can I get some explanation of the docs for fitdistr(MASS)?"
2008 Sep 19
0
Re lative Novice ? "Can I get some explanation of the docs for fitdistr(MASS)?"
...o I have to massage my data into a form fitdistr can handle? If the latter, is there something available with R that will make the massage simple and quick? Thanks Ted -- View this message in context: http://www.nabble.com/Relative-Novice---%22Can-I-get-some-explanation-of-the-docs-for-fitdistr%28MASS%29-%22-tp19578052p19578052.html Sent from the R help mailing list archive at Nabble.com.
Questions on the results from glmmPQL(MASS)
2008 Dec 06
1
Questions on the results from glmmPQL(MASS)
Dear Rusers, I have used R,S-PLUS and SAS to analyze the sample data "bacteria" in MASS package. Their results are listed below. I have three questions, anybody can give me possible answers? Q1:From the results, we see that R get 'NAs'for AIC,BIC and logLik, while S-PLUS8.0 gave the exact values for them. Why? I had thought that R should give the same results as SPLUS here.