I want to run Shapiro-Wilk test for each variable in my dataset, each
grouped by variable groupFactor.
I have these working commands:
> data.n<-names(data) # put names into a vector called data.n
> by(eval(parse(text=(paste("data",data.n[3],sep="$")))), data$factor,
> shapiro.test) #run shapiro.test
but I must to change the variable number manualy. How to automate this?
I tried this:
> for (r in 3:18) {
> by(eval(parse(text=(paste("data",data.n[3],sep="$")))), data$groupFactor,
> shapiro.test)
> }
but not working and no errors. Why?
Please help.
--
Regards,
Iurie Malai, Senior Lecturer
Department of Psychology
Faculty of Psychology and Special Education
Ion Creanga Moldova Pedagogical State University - www.upsm.md
http://en.wikipedia.org/wiki/Ion_Creang%C4%83_Pedagogical_State_University
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