On 10/29/2011 06:54 PM, Smart Guy wrote:
Hello Gurus,
I am still new to R. Here is my issue.
I was trying to add column to data frame that was populated by read.spss().
When I used cbind to add a new variable(column).
library(foreign)
mydf<-read.spss(file="C:/myspss.sav",use.value.labels=FALSE,
to.data.frame=TRUE,use.missings=FALSE)
attr(mydf,"variable.labels")
## it gives you all the labels
##Adding a new variable(col) to mydf
newcolm<- list(frt="grapes")
mydf<- cbind(mydf, newrow)
##Now checking to see labels again
attr(mydf,"variable.labels")
## And you get NULL
Can anyone please help me to achieve this without loosing any default
attribute that was there?
Hi SmartG,
I assume that the "newcolm"-"newrow" is just a typo in the example
above. Assuming that you are managing to get your new column in "mydf",
you can add the new variable name like this:
oldvl<-attr(mydf,"variable.labels")
mydf<-cbind(mydf,newrow)
attr(mydf,"variable.labels")<-c(oldvl,"newvar")
Jim
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