[R] taking rows from a data frame

Lei Jiang lj22 at u.washington.edu
Thu Nov 21 02:31:44 CET 2002

hi, there.

Here is my problem. I have a data frame by read.table(). I want to take
every row from this data frame and compute the correlation between the
current row and a fixed vector. finally I want to append the correlation
computed as a column to the data frame.

this is what i am doing.
df<-read.delim("filename", col.names=v)
myv<-c(....)#this is my vector that I need to compute cor with
corv<-cor(t(df[,c(..)]), myv, use="complete.obs") #only use c(..) in df

the values I got from corv doesnt seem to be right when I tried to verify
them. the way i am doing this is probably not very smart or totally wrong.
Can someone help?

thanks very much.


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