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5 results for “from:Petra Wallem”

box m-test
Petra Wallem · Aug 25, 2005 · r-help

Hello everybody, Is there in R a so called box m-test for testing the equality of the variance/cov. matrix for checking on homoscedasticity? I could not find it among the traditional packages for multivariate statistics... Petra -- Petra Wallem...

shlib compilation problem
Petra Wallem · Jul 31, 2005 · r-help

Hello everybody I am having the following problem intalling a packages on R 2.1.0 on OS. Suse 9.1 Using the command "R CMD" I get following error message .../SHLIB/: line 1: make: command not found ERROR: compliation...

correspondence analysis
Petra Wallem · May 9, 2003 · r-help

Hi everybody, I am starting my friendship with R. Now I want to do a Correspondence Analysis using the vegan library or multiv library. Both give me the same results which differ from the ones I get running other programs...

factorial anova
Petra Wallem · Dec 25, 2005 · r-help

Hello every body, I am trying to do a factorial anova analysis following this model: model<-anova(lm(responsevariable~factorA*factorB)) model<-anova(lm(luz$dosel~luz$estado*luz$Bosque)) Df Sum Sq Mean Sq F value Pr(>F) estado...

factorial anova
Petra Wallem · Dec 27, 2005 · r-help

Thanks a lot to all of your responses, I did follow your adivces, but finnally to really get it understanded I acctually did the work to calculate the anova step by step on an excel spread sheet to see if...

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