Re: [R] create arrays
I can get around it by doing something like: as.matrix(rep(1,291))*row(as.matrix(rep(1,291)))/10+.9 I was just hoping for a simple command. Schatzi wrote: In Matlab, an array can be created from 1 - 30 using the command similar to R which is 1:30. Then, to make the array step by 0.1 the command is 1:0.1:30 which is 1, 1.1, 1.2,...,29.9,30. How can I do this in R? - In theory, practice and theory are the same. In practice, they are not - Albert Einstein -- View this message in context: http://r.789695.n4.nabble.com/create-arrays-tp3503988p3503998.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org 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.
Re: [R] create arrays
On Fri, May 06, 2011 at 12:11:30PM -0700, Schatzi wrote: In Matlab, an array can be created from 1 - 30 using the command similar to R which is 1:30. Then, to make the array step by 0.1 the command is 1:0.1:30 which is 1, 1.1, 1.2,...,29.9,30. How can I do this in R? ... This may well be a hack, but 10:300/10 seemed to do it for me. Peace, david -- David H. Wolfskill r...@catwhisker.org Depriving a girl or boy of an opportunity for education is evil. See http://www.catwhisker.org/~david/publickey.gpg for my public key. pgpGpFjB08hOL.pgp Description: PGP signature __ R-help@r-project.org 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.
Re: [R] create arrays
?seq -- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare greg.s...@imail.org 801.408.8111 -Original Message- From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- project.org] On Behalf Of Schatzi Sent: Friday, May 06, 2011 1:12 PM To: r-help@r-project.org Subject: [R] create arrays In Matlab, an array can be created from 1 - 30 using the command similar to R which is 1:30. Then, to make the array step by 0.1 the command is 1:0.1:30 which is 1, 1.1, 1.2,...,29.9,30. How can I do this in R? - In theory, practice and theory are the same. In practice, they are not - Albert Einstein -- View this message in context: http://r.789695.n4.nabble.com/create- arrays-tp3503988p3503988.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org 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. __ R-help@r-project.org 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.
Re: [R] create arrays
On Fri, May 6, 2011 at 12:11 PM, Schatzi adele_thomp...@cargill.com wrote: In Matlab, an array can be created from 1 - 30 using the command similar to R which is 1:30. Then, to make the array step by 0.1 the command is 1:0.1:30 which is 1, 1.1, 1.2,...,29.9,30. How can I do this in R? Hmm, in this case, I would do it slightly differently: seq(from = 1, to = 30, by = .1) Cheers, Josh - In theory, practice and theory are the same. In practice, they are not - Albert Einstein -- View this message in context: http://r.789695.n4.nabble.com/create-arrays-tp3503988p3503988.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org 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. -- Joshua Wiley Ph.D. Student, Health Psychology University of California, Los Angeles http://www.joshuawiley.com/ __ R-help@r-project.org 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.
Re: [R] create arrays
Beautiful. -Original Message- From: greg.s...@imail.org [mailto:greg.s...@imail.org] Sent: Friday, May 06, 2011 02:17 PM To: Thompson, Adele - adele_thomp...@cargill.com; r-help@r-project.org Subject: RE: [R] create arrays ?seq -- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare greg.s...@imail.org 801.408.8111 -Original Message- From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- project.org] On Behalf Of Schatzi Sent: Friday, May 06, 2011 1:12 PM To: r-help@r-project.org Subject: [R] create arrays In Matlab, an array can be created from 1 - 30 using the command similar to R which is 1:30. Then, to make the array step by 0.1 the command is 1:0.1:30 which is 1, 1.1, 1.2,...,29.9,30. How can I do this in R? - In theory, practice and theory are the same. In practice, they are not - Albert Einstein -- View this message in context: http://r.789695.n4.nabble.com/create- arrays-tp3503988p3503988.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org 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. __ R-help@r-project.org 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.
Re: [R] create arrays
Some good suggestions, just (as always) be aware of floating-point imprecision. See FAQ 7.31 s - seq(1,30,0.1) s[8] [1] 1.7 s[8] == 1.7 [1] FALSE Just trying to forestall future questions :-) Dan Daniel Nordlund Bothell, WA USA -Original Message- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of adele_thomp...@cargill.com Sent: Friday, May 06, 2011 12:18 PM To: greg.s...@imail.org; r-help@r-project.org Subject: Re: [R] create arrays Beautiful. -Original Message- From: greg.s...@imail.org [mailto:greg.s...@imail.org] Sent: Friday, May 06, 2011 02:17 PM To: Thompson, Adele - adele_thomp...@cargill.com; r-help@r-project.org Subject: RE: [R] create arrays ?seq -- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare greg.s...@imail.org 801.408.8111 -Original Message- From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- project.org] On Behalf Of Schatzi Sent: Friday, May 06, 2011 1:12 PM To: r-help@r-project.org Subject: [R] create arrays In Matlab, an array can be created from 1 - 30 using the command similar to R which is 1:30. Then, to make the array step by 0.1 the command is 1:0.1:30 which is 1, 1.1, 1.2,...,29.9,30. How can I do this in R? - In theory, practice and theory are the same. In practice, they are not - Albert Einstein -- View this message in context: http://r.789695.n4.nabble.com/create- arrays-tp3503988p3503988.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org 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. __ R-help@r-project.org 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. __ R-help@r-project.org 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.
Re: [R] Create Arrays
Hi, Doug,
maybe
HH - c(0.88, 0.72, 0.89, 0.93, 1.23, 0.86, 0.98, 0.85, 1.23)
TT - c(7.14, 7.14, 7.49, 8.14, 7.14, 7.32, 7.14, 7.14, 7.14)
columnnumbers - c(0, 0, 0, 3, 0, 0, 0, 2, 0)
TMP - lapply( seq( columnnumbers),
function( i, CN, M) {
if( CN[i] == 0) as.matrix( M[, i]) else
matrix( -1, nrow( M), CN[i])
}, CN = columnnumbers, M = rbind( HH, TT))
do.call( cbind, TMP)
gets close to what you want (after some adaptation, of course).
HTH -- Gerrit
-
AOR Dr. Gerrit Eichner Mathematical Institute, Room 212
gerrit.eich...@math.uni-giessen.de Justus-Liebig-University Giessen
Tel: +49-(0)641-99-32104 Arndtstr. 2, 35392 Giessen, Germany
Fax: +49-(0)641-99-32109http://www.uni-giessen.de/cms/eichner
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Re: [R] Create Arrays
Hi Gerrit,
Almost it but I need to insert M[,i] as well as (matrix( -1, nrow( M),
CN[i]) when CN[i] = 0
I know this is not correct but can something like the following be done?
HH - c(0.88, 0.72, 0.89, 0.93, 1.23, 0.86, 0.98, 0.85, 1.23)
TT - c(7.14, 7.14, 7.49, 8.14, 7.14, 7.32, 7.14, 7.14, 7.14)
c - c(0, 0, 0, 2, 0, 0, 0, 2, 0)
TMP - lapply( seq(c),
function( i, CN, M) {
if( CN[i] == 0) as.matrix( M[, i]) else
(matrix( -1, nrow( M), CN[i]) as.matrix( M[, i]))
}, CN = c, M = rbind( HH, TT))
do.call( cbind, TMP)
Doug
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Re: [R] Create Arrays
On Fri, Oct 15, 2010 at 9:55 AM, dpender d.pen...@civil.gla.ac.uk wrote:
Hi,
For this example:
O - c(0 0 0 2 0 0 2 0)
I want to create an array every time O[i] 0. The array should be in the
form;
R[j] - array(-1, dim=c(2,O[i]))
i.e. if O[i] 0 4 times I want 4 R arrays.
Does anyone have any suggestions?
Suggestion number l is don't use O for objects! Far too confusing!
Serious suggestion is that a concrete example will help. Let me try:
If:
X = c(0,0,0,2,0,0,3,0) # I'm not using O here!
Then
R will be a list of length 2 because there are 2 values in X bigger than 0.
R[1] will be array(-1,dim=c(2,2)) # because X[4] is 2
and
R[2] will be array(-1,dim=c(2,3)) # because X[7] is 3
Yup?
Okay, first get rid of the zeroes:
Xnz = X[X!=0]
That simplifies the problem. Then use lapply to iterate over Xnz with
a function that returns the array given the value:
lapply(Xnz,function(x){array(-1,dim=c(2,x))})
[[1]]
[,1] [,2]
[1,] -1 -1
[2,] -1 -1
[[2]]
[,1] [,2] [,3]
[1,] -1 -1 -1
[2,] -1 -1 -1
2-d arrays are just matrices, so you can do it all in one line with:
lapply(X[X!=0],function(x){matrix(-1,2,x)})
Barry
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Re: [R] Create Arrays
Hi, Doug, maybe columns - c( 0, 3, 0, 2, 0, 1) lapply( columns[ columns 0], function( o) array( -1, dim = c( 2, o))) does what you want? Regards -- Gerrit - AOR Dr. Gerrit Eichner Mathematical Institute, Room 212 gerrit.eich...@math.uni-giessen.de Justus-Liebig-University Giessen Tel: +49-(0)641-99-32104 Arndtstr. 2, 35392 Giessen, Germany Fax: +49-(0)641-99-32109 http://www.uni-giessen.de/~gcb7 - Zitat von dpender d.pen...@civil.gla.ac.uk: Hi, For this example: O - c(0 0 0 2 0 0 2 0) I want to create an array every time O[i] 0. The array should be in the form; R[j] - array(-1, dim=c(2,O[i])) i.e. if O[i] 0 4 times I want 4 R arrays. Does anyone have any suggestions? Thanks, Doug -- View this message in context: http://r.789695.n4.nabble.com/Create-Arrays-tp2996706p2996706.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org 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. __ R-help@r-project.org 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.
Re: [R] Create Arrays
Barry, Gerrit,
That was what I am after but unfortunately only the starting point. I am
now trying to amend a function that inserts the R matrices into a dataset in
the correct places:
i.e.
H - c(0.88, 0.72, 0.89, 0.93, 1.23, 0.86, 0.98, 0.85, 1.23)
T - c(7.14, 7.14, 7.49, 8.14, 7.14, 7.32, 7.14, 7.14, 7.14)
O - c(0, 0, 0, 3, 0, 0, 0, 2, 0)
R - lapply(O[O!=0], function(x){matrix(-1,1,x)})
m - rbind(H, T)
O2 - rbind(O,O)
f - function(x, y, z) {
if(nrow(x) != nrow(y) || nrow(y) != length(z))
stop('unequal numbers of rows among inputs')
out - matrix(NA,2,length(H)+sum(O))
for(i in 1:2)
out[[i,]] - append(x[i,], as.numeric(z[[i]]), after = which(y[i,]
0) - 1)
out
}
f(m, O2, R)
f is the function that requires amendment and was originally written for a
single R value and treated each row of out separately.
I now want to insert R[i] into m before every point that O[i] 0
Hope this makes sense.
Doug
I don
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