gt; David L Carlson
> Department of Anthropology
> Texas A&M University
> College Station, TX 77840-4352
>
>
> -Original Message-
> From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of Sergio
> Fonda
> Sent: Friday, June 5, 2015 8:47 AM
> To: John Kane
> Cc:
nda
Sent: Friday, June 5, 2015 8:47 AM
To: John Kane
Cc: R-help
Subject: Re: [R] Matrix of indexes to extract sparse data in dataframe
Thank you, of course but I can't use that form as I told. My question is
about the possibility to enter in a dataframe with a matrix of indices and
get the cor
oes it.
>
> John Kane
> Kingston ON Canada
>
>
> > -Original Message-
> > From: sergio.fond...@gmail.com
> > Sent: Fri, 5 Jun 2015 15:06:34 +0200
> > To: r-help@r-project.org
> > Subject: [R] Matrix of indexes to extract sparse data in dataframe
d1 <- apply(c0, 1, min) I think does it.
John Kane
Kingston ON Canada
> -Original Message-
> From: sergio.fond...@gmail.com
> Sent: Fri, 5 Jun 2015 15:06:34 +0200
> To: r-help@r-project.org
> Subject: [R] Matrix of indexes to extract sparse data in dataframe
&g
I would like to avoid a "for loop" to get a vector of data taken from
rows of a data frame for specific columns.
An example is the following (I can't apply min to every row of df, this is
just an example):
c0=data.frame(a=c(3,-2,12,7,-23,17) , b=c(-1,-3,14,2,6,19))
c1=apply(c0,1,which.min)
> c1
[1
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