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5 results for “from:Cowpertwait, Paul”

Fitting distributions
Cowpertwait, Paul · Sep 4, 2001 · r-help

Are there any functions in R for fitting distributions? In particular, I would like to fit the weibull and extreme-value distributions when: i) the data are given and the maximum likelihood estimates are required; ii) the sample moments are...

further to my last email
Cowpertwait, Paul · Dec 13, 2001 · r-help

.. the round function seems to get round it (excuse the pun): > round(gamma(21)/(gamma(6)*gamma(16))) == round(choose(20,5)) [1] TRUE So I presume the problem is related to gamma being a real function. However, I'm...

inconsistency between gamma and choose functions
Cowpertwait, Paul · Dec 13, 2001 · r-help

Please can someone explain why I seem to get these contradictory results? choose(5,2) [1] 10 gamma(6)/(gamma(3)*gamma(4)) [1] 10 gamma(6)/(gamma(3)*gamma(4)) == choose(5,2) [1] TRUE # all's well so...

data manipulation
Cowpertwait, Paul · Sep 4, 2001 · r-help

Antonio, This seems to work (but you may want to adjust the resulting column names): length2.dat <- data.frame(cbind(length1.dat$LT[-c(5,6)], length1.dat$LF[-c(5,6)])) _____________________________________ Paul S.P. Cowpertwait IIMS, Massey University, Albany...

Array as time series?
Cowpertwait, Paul · Sep 6, 2001 · r-help

If your data is a bit like rainfall at multiple sites, I could probably offer some comments (assuming (x,y,z,t) is location and time?), although I don't know how useful they will be for your particular application...

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