With summary do this my.summary<-function(x) c(mean(x),var(x))
summary(v1~V, fun=my.summary,data=df) summary(v2~V, fun=my.summary,data=df) summary(v3~V, fun=my.summary,data=df) summary(v4~V, fun=my.summary,data=df) summary(v5~V, fun=my.summary,data=df) If you want you get the mean of all variable together in all table my.summary<-function(x) c(mean(x[,1]),mean(x[,2]),mean(x[,3]),mean(x[,4]),mean(x[,5])) summary(cbind(v1,v2,v3,v4,v5)~v,data=df) Justin BEM BP 1917 Yaoundé Tél (237) 76043774 ________________________________ De : effeesse <scarpin...@gmail.com> À : r-help@r-project.org Envoyé le : Lun 13 décembre 2010, 15h 14min 22s Objet : Re: [R] Re : descriptive statistics I am sorry, but I cannot understand how to use the "summary" function. Maybe, if I describe my needs, you could sketch a line that could work. In the data set variable "V" can take values 1 to 14. For the subgroup of individuals where "V" takes value =1 I want the mean and variance of a certain set of other variables (V1, V2, V3, V4, V5). And this for all the other subgroups for values 2 to 14. What do you suggest? -- View this message in context: http://r.789695.n4.nabble.com/descriptive-statistics-tp3085197p3085462.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. [[alternative HTML version deleted]]
______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
