R help - Jun 2011 - change value in one cell

Hello all,

I am wondering if there is a way to change the value of one cell in R. For
instance let's say I have a hypothetical data frame that looks like this:

Obs X Y Z
1    1 0 1
2    0 0 1
3    1 1 1
4    0 1 1
5    1 1 0
6    0 0 0

I would like to change the value of the 4th observation in the Y column from
1 to 0. It should look like this:

Obs X Y Z
1    1 0 1
2    0 0 1
3    1 1 1
4    0 0 1
5    1 1 0
6    0 0 0

Is it possible to change the value in one command?

Thanks,

Carlos


--
View this message in context:
http://r.789695.n4.nabble.com/change-value-in-one-cell-tp3589456p3589456.html
Sent from the R help mailing list archive at Nabble.com.

you probably need to read the Introduction to R to understand indexing:
> x
  Obs X Y Z
1   1 1 0 1
2   2 0 0 1
3   3 1 1 1
4   4 0 1 1
5   5 1 1 0
6   6 0 0 0
> x[4, "Y"] <- 0
> x
  Obs X Y Z
1   1 1 0 1
2   2 0 0 1
3   3 1 1 1
4   4 0 0 1
5   5 1 1 0
6   6 0 0 0


On Fri, Jun 10, 2011 at 5:42 PM, jour4life <jour4life at gmail.com>
wrote:
> Hello all,
>
> I am wondering if there is a way to change the value of one cell in R. For
> instance let's say I have a hypothetical data frame that looks like
this:
>
> Obs X Y Z
> 1 ? ?1 0 1
> 2 ? ?0 0 1
> 3 ? ?1 1 1
> 4 ? ?0 1 1
> 5 ? ?1 1 0
> 6 ? ?0 0 0
>
> I would like to change the value of the 4th observation in the Y column
from
> 1 to 0. It should look like this:
>
> Obs X Y Z
> 1 ? ?1 0 1
> 2 ? ?0 0 1
> 3 ? ?1 1 1
> 4 ? ?0 0 1
> 5 ? ?1 1 0
> 6 ? ?0 0 0
>
> Is it possible to change the value in one command?
>
> Thanks,
>
> Carlos
>
>
> --
> View this message in context:
http://r.789695.n4.nabble.com/change-value-in-one-cell-tp3589456p3589456.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> 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.
>


-- 
Jim Holtman
Data Munger Guru

What is the problem that you are trying to solve?