[R] remove data frame from list of data frames

[Matthew Finkbeiner]

Thank you Jim (and others who responded off list).  This does the
trick for me perfectly:

ls[sapply(ls, function(x) all(x$Acc == 1))]

Thanks again!

Matthew



On Sun, Nov 7, 2010 at 11:34 PM, jim holtman <jholtman at gmail.com> wrote:
> 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
>>
>> ______________________________________________
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>> 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?
>