i'd use:
test[["Y"]] <- NULL
b
On Tue, Feb 23, 2010 at 4:13 PM, adam naples <adam.nap...@yale.edu> wrote:
> try
>
> test <- subset(test, select = -c(Y))
>
> The key is the minus sign before c() in the select argument.
> You can put in as many columns as you like.
> -a
>
> On Feb 23, 2010, at 11:02 AM, David Winsemius wrote:
>
>>
>> On Feb 23, 2010, at 6:04 AM, Knut Krueger wrote:
>>
>>> Hi to all,
>>> test <- data.frame("X"=c(1:4),"Y"=c(5:8),"Z"=c(8:11))
>>> test <- test[,-2]
>>>
>>> Is there a way to specify the col name "Y" to delete instead the number?
>>>
>>
>> I believe that negative indexing only works with numeric arguments. You
>> could dummy up a negation approach for character vectors with:
>>
>> > test[, !(names(test) %in% c("Y"))] #non-negated logical vector to index
>> X Z
>> 1 1 8
>> 2 2 9
>> 3 3 10
>> 4 4 11
>>
>> > test[, -grep("Y",names(test))] # negated numeric vector to index
>> X Z
>> 1 1 8
>> 2 2 9
>> 3 3 10
>> 4 4 11
>>
>> --
>> David
>>> Kind regards Knut
>>>
>>> ______________________________________________
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>>
>> ______________________________________________
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>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>
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>
> ______________________________________________
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>
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