> x = matrix(rnorm(9),3) > x [,1] [,2] [,3] [1,] 1.29693748 0.2018959 0.02534092 [2,] -1.19468858 -1.2249229 -0.85948508 [3,] -0.09274508 0.4071841 -0.11481410 > apply(x,1,which.min) [1] 3 2 3
On 8/20/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > > One more question. After I collapse everything into one matrix, I would > like to find the index of column that holds minimum value for each row. I > remember that there is a function like maxCols but I can't seem to find the > same thing for minimum value. Any suggestion please? > > - adschai > > > ----- Original Message -----From: Gabor Grothendieck Date: Sunday, August > 19, 2007 8:48 pmSubject: Re: [R] how to collapse a list of 1 column matrix > to a matrix?To: "[EMAIL PROTECTED]" Cc: r-help@stat.math.ethz.ch> Try > this:> > L <- list(`1` = matrix(1:4, 4), `2` = matrix(5:8, 4))> sapply(L, > c)> > Note that the list component names are kept as column names in > the > result> > > On 8/19/07, [EMAIL PROTECTED] wrote:> > Hi,> >> > I > encounter a situation where I have a list whose element is a > column > matrix. Says,> >> > $'1'> > [,1]> > 1> > 2> > 3> >> > $'2'> > [,1]> > 4> > > 5> > 6> >> > Is there fast way to collapse the list into a matrix like a > > cbind operation in this case? Meaning, the result should be a > matrix that > looks like:> >> > [,1] [,2]> > [1,] 1 4> > [2,] 2 5> > > [3,] 3 6> >> > I can loop through all elements and do cbind > manually. But I > think there must be a simpler way that I don't know. Thank > you.> >> > - adschai> >> > __! > ____________________________________________> > [EMAIL PROTECTED] 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@stat.math.ethz.ch 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. > [[alternative HTML version deleted]] ______________________________________________ R-help@stat.math.ethz.ch 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.