R help - Aug 2010 - TRUE FALSE issue

How can I extract the samples (S1-S5) containing a TRUE value in their row?
Solution should apply to a much bigger data frame.
> a
Samples A B C D . . .
1 S1 FALSE FALSE FALSE FALSE
2 S2 FALSE FALSE NA TRUE
3 S3 FALSE FALSE FALSE FALSE
4 S4 FALSE TRUE FALSE FALSE
5 S5 FALSE FALSE FALSE FALSE
.
.
.

Thank you guys, I appreciate your help a lot!

	[[alternative HTML version deleted]]

On 08/10/2010 09:04 PM, Alexander Eggel wrote:
> How can I extract the samples (S1-S5) containing a TRUE value in their row?
> Solution should apply to a much bigger data frame.
>
>> a
> Samples A B C D . . .
> 1 S1 FALSE FALSE FALSE FALSE
> 2 S2 FALSE FALSE NA TRUE
> 3 S3 FALSE FALSE FALSE FALSE
> 4 S4 FALSE TRUE FALSE FALSE
> 5 S5 FALSE FALSE FALSE FALSE
> .
Please give us *reproducible* examples as the posting guide requests.

See ?rowSums

On Aug 10, 2010, at 10:16 PM, Erik Iverson wrote:
> On 08/10/2010 09:04 PM, Alexander Eggel wrote:
>> How can I extract the samples (S1-S5) containing a TRUE value in  
>> their row?
>> Solution should apply to a much bigger data frame.
>>
>>> a
>> Samples A B C D . . .
>> 1 S1 FALSE FALSE FALSE FALSE
>> 2 S2 FALSE FALSE NA TRUE
>> 3 S3 FALSE FALSE FALSE FALSE
>> 4 S4 FALSE TRUE FALSE FALSE
>> 5 S5 FALSE FALSE FALSE FALSE
>> .
>
> Please give us *reproducible* examples as the posting guide requests.
>
> See ?rowSums
Or

?any
?apply
>

David Winsemius, MD
West Hartford, CT

> with(a, Samples[apply(a[,-1], 1, any)])
[1] S2 S4
Levels: S1 S2 S3 S4 S5 

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of Alexander Eggel
Sent: Wednesday, 11 August 2010 12:05 PM
To: r-help at r-project.org
Subject: [R] TRUE FALSE issue

How can I extract the samples (S1-S5) containing a TRUE value in their row?
Solution should apply to a much bigger data frame.
> a
Samples A B C D . . .
1 S1 FALSE FALSE FALSE FALSE
2 S2 FALSE FALSE NA TRUE
3 S3 FALSE FALSE FALSE FALSE
4 S4 FALSE TRUE FALSE FALSE
5 S5 FALSE FALSE FALSE FALSE
.
.
.

Thank you guys, I appreciate your help a lot!

	[[alternative HTML version deleted]]

______________________________________________
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.

For huge cases this might be a whiff faster
> with(a, Samples[rowSums(a[, -1], na.rm = TRUE) > 0])
[1] S2 S4
Levels: S1 S2 S3 S4 S5



-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of Bill.Venables at csiro.au
Sent: Wednesday, 11 August 2010 12:21 PM
To: eggali at gmx.net; r-help at r-project.org
Subject: [ExternalEmail] Re: [R] TRUE FALSE issue
> with(a, Samples[apply(a[,-1], 1, any)])
[1] S2 S4
Levels: S1 S2 S3 S4 S5 

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of Alexander Eggel
Sent: Wednesday, 11 August 2010 12:05 PM
To: r-help at r-project.org
Subject: [R] TRUE FALSE issue

How can I extract the samples (S1-S5) containing a TRUE value in their row?
Solution should apply to a much bigger data frame.
> a
Samples A B C D . . .
1 S1 FALSE FALSE FALSE FALSE
2 S2 FALSE FALSE NA TRUE
3 S3 FALSE FALSE FALSE FALSE
4 S4 FALSE TRUE FALSE FALSE
5 S5 FALSE FALSE FALSE FALSE
.
.
.

Thank you guys, I appreciate your help a lot!

	[[alternative HTML version deleted]]

______________________________________________
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.

______________________________________________
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.