Re: [R] Matrix max by row

2009-03-30 Thread Wacek Kusnierczyk
Bert Gunter wrote: > > Serves me right, I suppose. Timing seems also very dependent on the > dimensions of the matrix. Here's what I got with my inadequate test: > > >> x <- matrix(rnorm(3e5),ncol=3) >> > ## via apply > >> system.time(apply(x,1,max)) >> >user system elapsed

Re: [R] Matrix max by row

2009-03-30 Thread Bert Gunter
Sent: Monday, March 30, 2009 2:33 AM To: Rolf Turner Cc: Bert Gunter; 'Ana M Aparicio Carrasco'; r-help@r-project.org Subject: Re: [R] Matrix max by row Rolf Turner wrote: > I tried the following: > > m <- matrix(runif(10),1000,100) > junk <- gc() > print(system.t

Re: [R] Matrix max by row

2009-03-30 Thread Wacek Kusnierczyk
>> >> Hint:The man page for ?data.frame says: >> "A data frame is a list of variables of the same length with unique row >> names, given class 'data.frame'." >> >> Cheers, >> Bert >> >> Bert Gunter >> Genentech Nonclinica

Re: [R] Matrix max by row

2009-03-29 Thread Bill.Venables
essage- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Rolf Turner Sent: Monday, 30 March 2009 1:39 PM To: Bert Gunter Cc: 'Wacek Kusnierczyk'; r-help@r-project.org Subject: Re: [R] Matrix max by row I tried the following: m <- matrix(runif

Re: [R] Matrix max by row

2009-03-29 Thread Rolf Turner
project.org] On Behalf Of Wacek Kusnierczyk Sent: Saturday, March 28, 2009 5:22 PM To: Ana M Aparicio Carrasco Cc: r-help@r-project.org Subject: Re: [R] Matrix max by row Ana M Aparicio Carrasco wrote: I need help about how to obtain the max by row in a matrix. For example if I have the follow

Re: [R] Matrix max by row

2009-03-29 Thread Bert Gunter
Of Wacek Kusnierczyk Sent: Saturday, March 28, 2009 5:22 PM To: Ana M Aparicio Carrasco Cc: r-help@r-project.org Subject: Re: [R] Matrix max by row Ana M Aparicio Carrasco wrote: > I need help about how to obtain the max by row in a matrix. > For example if I have the following matrix: > 2 5

Re: [R] Matrix max by row

2009-03-28 Thread jim holtman
?apply > x <- rbind(c(2,5,3),c(8,7,2),c(1,8,4)) > apply(x, 1, max) [1] 5 8 8 > > On Sat, Mar 28, 2009 at 7:54 PM, Ana M Aparicio Carrasco wrote: > I need help about how to obtain the max by row in a matrix. > For example if I have the following matrix: > 2 5 3 > 8 7 2 > 1 8 4 > > The max by row

Re: [R] Matrix max by row

2009-03-28 Thread Wacek Kusnierczyk
Ana M Aparicio Carrasco wrote: > I need help about how to obtain the max by row in a matrix. > For example if I have the following matrix: > 2 5 3 > 8 7 2 > 1 8 4 > > The max by row will be: > 5 > 8 > 8 > matrix(apply(m, 1, max), nrow(m)) vQ __ R-he

[R] Matrix max by row

2009-03-28 Thread Ana M Aparicio Carrasco
I need help about how to obtain the max by row in a matrix. For example if I have the following matrix: 2 5 3 8 7 2 1 8 4 The max by row will be: 5 8 8 Thank you. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https: