A) Please remove "->" from your vocabulary. Also, always put spaces on either
side of an assignment so the parser doesn't get confused.
B) This is a pretty basic question.
("a"==my.data$letters.1.10.) is a vector of logical values.
( ("a"==my.data$letters.1.10.) & ("k"==my.data$letters.1.20.) ) i
Great - thanks for the explanation and for the solution using
stringsAsFactors=FALSE in the data.frame function
Sverre
On Mon, Jul 11, 2011 at 3:57 PM, Sarah Goslee wrote:
> Hi Sverre,
>
> On Mon, Jul 11, 2011 at 12:48 PM, Sverre Stausland
> wrote:
>> Dear helpers,
>>
>> how can I extract only
Hi Sverre,
On Mon, Jul 11, 2011 at 12:48 PM, Sverre Stausland
wrote:
> Dear helpers,
>
> how can I extract only the values from a row in a data frame? Using
> [X,] doesn't do the trick:
>
>> data.frame(letters[1:10],letters[11:20])->my.data
>> my.data[1,]
> letters.1.10. letters.11.20.
> 1
Dear helpers,
how can I extract only the values from a row in a data frame? Using
[X,] doesn't do the trick:
> data.frame(letters[1:10],letters[11:20])->my.data
> my.data[1,]
letters.1.10. letters.11.20.
1 a k
I would like to be able to extract only the values "a" and
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