[R] Non linear fitting of 2 distributions with shared parameters

2009-10-12 Thread Etienne Toffin
ter). This point is where I need some help : is there any function to make non-linear fitting of (at least) 2 data sets with shared parameters ? Hope someone will have some good news for me… Etienne Toffin [[alternative HTML version deleted]] _

[R] 2x2 Contingency table with much sampling zeroes

2009-10-20 Thread Etienne Toffin
T1=rep(c ("YES","YES","NO","NO"),2),T2=rep(c("YES","NO","YES","NO"),2),Freq=c (12,5,0,7,24,1,0,0)) What do you think of such datas ? Can I use any statistical method to test my hypothesis ? Any advice ? Than

[R] How to compare parameters of non linear fitting curves

2009-04-21 Thread Etienne Toffin
if there is any statistical method to compare the estimated values of parameters of the two distributions ? And wether it's the case, how to perform it in R ? Hope I'm clear enough for getting help, Etienne ----------- Etienne To

Re: [R] How to compare parameters of non linear fitting curves

2009-04-22 Thread Etienne Toffin
REATMENT) is different Do you have any other idea ? Thanks, Etienne One short question about nls: are there any reason why nlm should be used rather than nls and vice-versa (nls results are quite more full than those of nlm)? Hope this helps, Spencer Etienne Toffin wrote: Hi,

[R] Rép : How to compare parameters of non li near fitting curves - COMPLETE REPLY -

2009-04-22 Thread Etienne Toffin
used rather than nls and vice-versa (nls results are quite more full than those of nlm)? >Hope this helps, >Spencer > > Etienne Toffin wrote: >> Hi, >> >> I'm using a non linear model to fit experimental survival curves. >> >> This model de

[R] How to compare two regression line slopes

2009-01-27 Thread Etienne Toffin
- are these methods different ? - which one should be preferentially used ? This is not really a question about R but more about statistics… I don't think I'm really clear and I know I'm not rigorous at all in my descriptions, but I hope someone will understand me. Thanks, E

[R] R-squared value for linear regression passing through origin using lm()

2007-10-18 Thread Etienne Toffin
the linear regression with lm(y ~ x). It seems to be surprising to me: is this result normal ? Is there any problem in the R-squared value calculated in this case ? Etienne Toffin __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo

[R] Post-hoc test for Kruskal-Wallis

2007-10-26 Thread Etienne Toffin
Hi there, I've got a small question : is there any post-hoc test for Kruskal rank sum test integrated in R ? I know that the Nemenyi test is one of the post-hoc that can be used, but there's no (to by knowledge) R function for it. What should I do ? Thanks, Etienne __