Re: [R] select element from each row of the matrix

2011-07-20 Thread William Dunlap
1:35 PM > To: gallon li > Cc: R-help@r-project.org > Subject: Re: [R] select element from each row of the matrix > > > On Jul 20, 2011, at 4:23 PM, gallon li wrote: > > > I have a 5 column matrix like > > > > 12 10 8 6 3 > > 10 9 8 7 5 > > 14 NA

Re: [R] select element from each row of the matrix

2011-07-20 Thread Peter Alspach
21 July 2011 8:23 a.m. > To: R-help@r-project.org > Subject: [R] select element from each row of the matrix > > I have a 5 column matrix like > > 12 10 8 6 3 > 10 9 8 7 5 > 14 NA 4 NA NA NA > 15 NA 10 NA 5 > ... > > I want to select the position of the first ent

Re: [R] select element from each row of the matrix

2011-07-20 Thread David Winsemius
On Jul 20, 2011, at 4:23 PM, gallon li wrote: I have a 5 column matrix like 12 10 8 6 3 10 9 8 7 5 14 NA 4 NA NA NA 15 NA 10 NA 5 ... Probably something along the lines of aapply(mtx, 1, function(x) { c( x[ which(x <= 5)[1] ], # first row are the values whi

[R] select element from each row of the matrix

2011-07-20 Thread gallon li
I have a 5 column matrix like 12 10 8 6 3 10 9 8 7 5 14 NA 4 NA NA NA 15 NA 10 NA 5 ... I want to select the position of the first entry for each row <=5 for example, for the first row, I want to select the last element and return its position as 5; for th e third row, I want to select the third