Dear Jason,
Try this:

index<- with(test_data2_df,Location %in% "HSV")
test_data2_df$HouseSize<-ifelse(index,1000,test_data2_df$HouseSize)  # I
used 1000 as reference
test_data2_df

HTH,

Jorge


On Mon, Mar 23, 2009 at 1:39 PM, Jason Rupert <jasonkrupert@yahoo.com>wrote:

>
> I would like to replace a few varaibles within a data frame.
>
> For example, in the dataframe below (contrived) I would like to replace the
> current housesize value only if the Location is HSV.   However, I would like
> to leave the other values intact.
>
>
> I tried "ifelse", but I don't really need the else condition.
>
> test_data2_df<-data.frame(Variables=c("SQR Footage","SQR Footage","SQR
> Footage","SQR Footage","SQR Footage","SQR Footage","SQR Footage","SQR
> Footage","SQR Footage","SQR Footage","SQR Footage","SQR Footage","SQR
> Footage","SQR Footage","SQR Footage"),HouseSize=c(10, 20, 30, 40, 50, 15,
> 25, 35, 45, 55, 18, 28, 38, 48, 58), Lot=c(1, 2, 3, 4, 5, 10, 20, 30, 40,
> 50, 11, 21, 31, 41, 51), Location=c("HSV", "ATH", "HSV", "ATH", "FLO",
>                                     "HSV", "ATH", "HSV", "ATH", "FLO",
>                                     "HSV", "ATH", "HSV", "ATH", "FLO"))
>
> Moreover, I want to preserve the rest of the values within the data.  I
> thought some combination using the subset would get me there, but I ended up
> with a long and ungangly looking code.
>
> Thanks for any help that is offered.
>
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> PLEASE do read the posting guide
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> and provide commented, minimal, self-contained, reproducible code.
>

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