[R] Replace a list of values in data frame

From: Silvia Lipski <sillispiral_at_yahoo.com>
Date: Fri, 29 Feb 2008 05:50:53 -0800 (PST)

Dear R-users,

I am sorry if I ask for something that has been asked before, however, I still could not solve my little problem by consulting the previous thread on this topic:

I would like to replace several values in a data frame, such as in:

  subject response

1      me    black  
2      me    brown  
3     you      red  
4      me    black  
5     you    brown  

read in with read.table()

I would like to replace both "black" and "brown" by "dark".

What I have tried was:


which adds two columns:

 subject response black brown

1      me    black  dark  dark
2      me    brown  dark  dark


Replacing one value at a time as in:

gives this warning message:
 In test$response :
  $ operator is invalid for atomic vectors, returning NULL and returns all values for $response:
> test2

[1] black brown red black .....

I have tried many other things but nothing helps. I would be very grateful for your help!!!

Thanks a lot,

R-help_at_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. Received on Fri 29 Feb 2008 - 14:13:14 GMT

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.2.0, at Mon 03 Mar 2008 - 14:00:18 GMT.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help. Please read the posting guide before posting to the list.

list of date sections of archive