Re: [R] apply function within different groups

sep="",header=TRUE,stringsAsFactors=FALSE) library(plyr) ddply(dat1,.(group),summarize, f_myvar=mifunc(myvar)) #   group f_myvar #1 group1  NA #2 group2 299 #3 group2 300 #4 group3 499 #5 group3 500 #6 group4  NA A.K. - Original Message - From: Estefan

[R] apply function within different groups

Hi, I have a very big data frame and I would like to apply a function to one of the columns within different groups  and obtain another dataframe My data frame is like this: group var1 var2 myvar group1 1 a 100 group2 2 b 200 group2 34 c 300 group3 5 d 400 group3 6 e 500 group4 7 f 600

Re: [R] remove from column a group of elements I have in another vector

, Estefania From: Sarah Goslee To: Estefanía Gómez Galimberti Cc: "r-help@r-project.org" Sent: Friday, December 21, 2012 4:56 PM Subject: Re: [R] remove from column a group of elements I have in another vector You can probably do it with not in in

[R] remove from column a group of elements I have in another vector

Hi,   I have a data frame and I would need to remove from one of the columns a group of elements I have in another vector. How can I do that? I know how to do it with criteria but i would need to do it in a more automatic way In SQL I would use  where not in Thank you, Estefania