why the a[-indx] does not work?
ifelse(myvec == 0, FALSE, TRUE) # set 0 to FALSE, other values to TRUE
On Sun, Oct 30, 2011 at 3:50 PM, Alaios <alaios at yahoo.com> wrote:
probably you mean For ?[?-indexing only: ?i?, ?j?, ?...? can be logical vectors, indicating elements/slices to select. ?Such vectors are recycled if necessary to match the corresponding extent. ?i?, ?j?, ?...? can also be negative integers, indicating elements/slices to leave out of the selection. How can i convert the positives to TRUE and zeros and FALSE?
________________________________
From: William Dunlap <wdunlap at tibco.com>
Sent: Sunday, October 30, 2011 9:17 PM
Subject: RE: [R] why the a[-indx] does not work?
? > a[overLoadTesT==0]
? [1]? 2? 4? 5? 6? 7? 8? 9 10
Look into help('[') or help('Subscript') to see
how integer and logical (Boolean) subscripts differ.
Bill Dunlap
Spotfire, TIBCO Software
wdunlap tibco.com
-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of Alaios
Sent: Sunday, October 30, 2011 11:52 AM
To: R-help at r-project.org
Subject: [R] why the a[-indx] does not work?
Dear all,
Could you please explain me why
OverloadsTesT
[1] 1 0 1 0 0 0 0 0 0 0
a<-matrix(data=seq(1,10),nrow=10)
a
[,1]
[1,]? ? 1
[2,]? ? 2
[3,]? ? 3
[4,]? ? 4
[5,]? ? 5
[6,]? ? 6
[7,]? ? 7
[8,]? ? 8
[9,]? ? 9
[10,]? ?10
a[-OverloadsTesT]
[1]? 2? 3? 4? 5? 6? 7? 8? 9 10
the last line does not remove the first and third element and only does the first element.?
What I want to do is for zeros to return the elements and for any positive value to remove it.
What I am doing wrong?