I guess this is really basic. But I do not find an answer yet. I have a big data.frame. I would like to divede them into 10 deciles accounding to one of its member. Then I need a number for each decile with some computaion within each group. How to devide it?
Guojun Zhu wrote:> I guess this is really basic. But I do not find an > answer yet. I have a big data.frame. I would like to > divede them into 10 deciles accounding to one of its > member. Then I need a number for each decile with > some computaion within each group. How to devide it?For example, the result of cut() as a new variable to the data.frame and afterwards split() the data.frame by the resulting factor. Uwe Ligges> ______________________________________________ > R-help at stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Uwe Ligges wrote:> Guojun Zhu wrote: > > >>I guess this is really basic. But I do not find an >>answer yet. I have a big data.frame. I would like to >>divede them into 10 deciles accounding to one of its >>member. Then I need a number for each decile with >>some computaion within each group. How to devide it? > > > For example, the result of cut() as a new variable to the data.frame and > afterwards split() the data.frame by the resulting factor.Or library(Hmisc) xg <- cut2(x, g=10) # labels deciles nicely Frank> > Uwe Ligges >-- Frank E Harrell Jr Professor and Chair School of Medicine Department of Biostatistics Vanderbilt University