R help - Nov 2010 - remove data frame from list of data frames

I have a list of data frames like this:

a<- data.frame(x=runif(10), y = runif(10), Acc = 1)
b<- data.frame(x=runif(10), y = runif(10), Acc = 0)
ls<- list(a,b)

and I want to remove the data frames from ls that have Acc values other than 1.

How do I do that?

Thanks for any help!

Matthew

Is this what you are asking; this accepts any dataframe that has at
least one Acc = 1; changing 'any' to 'all' means all Acc==1. 
Play
around and get what you need:
> ls<- list(a,b)
> ls
[[1]]
            x         y Acc
1  0.26550866 0.2059746   1
2  0.37212390 0.1765568   1
3  0.57285336 0.6870228   1
4  0.90820779 0.3841037   1
5  0.20168193 0.7698414   1
6  0.89838968 0.4976992   1
7  0.94467527 0.7176185   1
8  0.66079779 0.9919061   1
9  0.62911404 0.3800352   1
10 0.06178627 0.7774452   1

[[2]]
            x         y Acc
1  0.93470523 0.4820801   0
2  0.21214252 0.5995658   0
3  0.65167377 0.4935413   0
4  0.12555510 0.1862176   0
5  0.26722067 0.8273733   0
6  0.38611409 0.6684667   0
7  0.01339033 0.7942399   0
8  0.38238796 0.1079436   0
9  0.86969085 0.7237109   0
10 0.34034900 0.4112744   0
> sapply(ls, function(x) any(x$Acc == 1))
[1]  TRUE FALSE
> ls[sapply(ls, function(x) any(x$Acc == 1))]
[[1]]
            x         y Acc
1  0.26550866 0.2059746   1
2  0.37212390 0.1765568   1
3  0.57285336 0.6870228   1
4  0.90820779 0.3841037   1
5  0.20168193 0.7698414   1
6  0.89838968 0.4976992   1
7  0.94467527 0.7176185   1
8  0.66079779 0.9919061   1
9  0.62911404 0.3800352   1
10 0.06178627 0.7774452   1
>
On Sun, Nov 7, 2010 at 6:07 AM, Matthew Finkbeiner
<matthew.finkbeiner at mq.edu.au> wrote:
> I have a list of data frames like this:
>
> a<- data.frame(x=runif(10), y = runif(10), Acc = 1)
> b<- data.frame(x=runif(10), y = runif(10), Acc = 0)
> ls<- list(a,b)
>
> and I want to remove the data frames from ls that have Acc values other
than 1.
>
> How do I do that?
>
> Thanks for any help!
>
> Matthew
>
> ______________________________________________
> 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
Cincinnati, OH
+1 513 646 9390

What is the problem that you are trying to solve?

Try this also:

 ls[colSums(sapply(ls, '[[', 'Acc')) > 0]


On Sun, Nov 7, 2010 at 9:07 AM, Matthew Finkbeiner <
matthew.finkbeiner@mq.edu.au> wrote:
> I have a list of data frames like this:
>
> a<- data.frame(x=runif(10), y = runif(10), Acc = 1)
> b<- data.frame(x=runif(10), y = runif(10), Acc = 0)
> ls<- list(a,b)
>
> and I want to remove the data frames from ls that have Acc values other
> than 1.
>
> How do I do that?
>
> Thanks for any help!
>
> Matthew
>
> ______________________________________________
> R-help@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.
>


-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O

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