Dear George,
Try this:
mat<-matrix(1:9,1,9)
which(mat==5,arr.ind=TRUE)
row col
[1,] 1 5
HTH,
Jorge
On Sun, Jan 4, 2009 at 1:21 AM, George Chen wrote:
> Hello,
> Could anybody tell me how to find the index for a value which I define in
> an array?
>
> ie.
>
> c<-matrix(1:9,1,9) #A
Hello,
Could anybody tell me how to find the index for a value which I define in an
array?
ie.
c<-matrix(1:9,1,9) #A 1x9 matrix filled with numbers 1 - 9 in order
I want to know the index for the value 5.
Thanks in advance,
George Chen
__
R-help@r
abntest[abntest$abntesr > 90,]
On Sun, Jan 4, 2009 at 11:55 AM, wrote:
> Hi:
>
> I'm loading in students test scores with:
>
>> abntest <- read.table("scores.txt")
>
> if I type:
>
>>abntest
>
> I get ALL the values. I want to be able to filter it by various things such
> as:
>
>
> if( abntes
Hi:
I'm loading in students test scores with:
> abntest <- read.table("scores.txt")
if I type:
>abntest
I get ALL the values. I want to be able to filter it by various things such as:
if( abntesr > 90) Print abntest;
and other logical operators. I'm sure this is simple for someone experie
Hi,
I have read ?loess help page and did some google on loess, however
there are insufficient information on weighted variance. I am
wondering that if any of you know of an example or document on
weighted variance using loess (), especially for the cases when more
than one explanatory variable is
Have you considered using the lattice-style panel functions that
hexbin provides:
mixdata <-
data.frame(x = c(rnorm(5000),rnorm(5000,4,1.5)),
y = c(rnorm(5000),rnorm(5000,2,3)),
a = gl(2, 5000))
hexbinplot(y ~ x, mixdata, aspect = 1,
panel=function(x, y
There seems to be no reason to use POSIXct in the first place.
Just use chron everywhere and read R News 4/1.
Suppose we just want month 9 from the merged object:
z2 <- zoo(data.matrix(DF), tt)
m <- merge(z, z2, all = c(FALSE, TRUE))
m[ m$mon %in% 9 ]
On Sat, Jan 3, 2009 at 7:57 PM, Sherri Heck
?commandArgs
On Sat, Jan 3, 2009 at 4:17 PM, wrote:
> Thank you.
> You're right. I come from C and C++ programming.
> I wonder whether to pass parameters to an R script I have to set environment
> variables ... ?
>
> Best regards,
> Maura
>
>
> -Messaggio originale-
> Da: jim holtman [ma
Dear All-
I am trying to merge two data files - they have different date formats
and different times zones. I need to match up the date/time of the
datasets and then invoke a conditional statement, such as: if dataC$mph
is >= 12 then keep dataM$co23 for the corresponding time/date stamp.
sn
On 3 January 2009 at 18:02, l...@stat.uiowa.edu wrote:
| The current byte code compiler available from my web site speeds this
| (highly artificial) example by about a factor of 4. The experimental
| byte code engine I am currently working on (and that can't yet do much
| more than an example lik
On Sat, 3 Jan 2009, Duncan Murdoch wrote:
On 03/01/2009 1:37 PM, Ajay Shah wrote:
As for jit and Ra, that was immediate reaction too but I found that jit
does
not help on your example. But I concur fully with what Ben said --- use
the
tool that is appropriate for the task at hand. If your ta
Major new features of RQDA-0.1-6:
GUI:
* GUI for file-organization (e.g searching, categorization etc.).
* GUI for settings (e.g. colors for )
Functions:
* Import a batch of files
* Calculate the relation between two codings, given the coding index
* Gives a summary of coding and inter-code relati
On 03-Jan-09 21:39:55, Erin Hodgess wrote:
> Dear R People:
>
> I have a small function that solves the "Jumble" puzzle from the
> newspaper (I know...big deal). It uses the the Linux "words" file.
>
> My question is: is there a similar words file for Windows, please?
>
> Thanks,
> Happy New (
On 03/01/2009 1:37 PM, Ajay Shah wrote:
As for jit and Ra, that was immediate reaction too but I found that jit does
not help on your example. But I concur fully with what Ben said --- use the
tool that is appropriate for the task at hand. If your task is running for
loops, Matlab does it faste
Ajay Shah wrote:
>> As for jit and Ra, that was immediate reaction too but I found that jit does
>> not help on your example. But I concur fully with what Ben said --- use the
>> tool that is appropriate for the task at hand. If your task is running for
>> loops, Matlab does it faster and you hav
rkevinbur...@charter.net wrote:
> I had a question about the basic power functions in R.
>
> For example from the R console I enter:
>
> -1 ^ 2
> [1] -1
>
> but also
>
> -1^3
> [1] -1
>
> -0.1^2
> [1] -0.01
>
> Normally pow(-1, 2) return either -Infinity or NaN. Has R taken over the math
> functi
on 01/03/2009 02:32 PM rkevinbur...@charter.net wrote:
> I had a question about the basic power functions in R.
>
> For example from the R console I enter:
>
> -1 ^ 2 [1] -1
>
> but also
>
> -1^3 [1] -1
>
> -0.1^2 [1] -0.01
>
> Normally pow(-1, 2) return either -Infinity or NaN. Has R taken
(Ted Harding) wrote:
> On 03-Jan-09 18:28:03, Ben Bolker wrote:
>
>> Ajay Shah mayin.org> writes:
>>
>>> On Sat, Jan 03, 2009 at 06:59:29PM +0100, Stefan Grosse wrote:
>>>
On Sat, 3 Jan 2009 22:25:38 +0530 Ajay Shah
mayin.org> wrote:
AS> system.time(for (i in 1:
(-1)^2
Or
a <- -1
a^2
-Original Message-
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On
Behalf Of rkevinbur...@charter.net
Sent: January 3, 2009 3:33 PM
To: r-help@r-project.org; r-h...@stat.math.ethz.ch
Subject: [R] Power functions?
I had a question about the
Watch the operator precedences. In R (and many other languages)
-1^2 == -(1^2) == -1
Perhaps you intended:
(-1)^2 == 1
On Sat, Jan 3, 2009 at 3:32 PM, wrote:
> I had a question about the basic power functions in R.
>
> For example from the R console I enter:
>
> -1 ^ 2
> [1] -1
>
> b
On 03/01/2009 4:39 PM, Erin Hodgess wrote:
Dear R People:
I have a small function that solves the "Jumble" puzzle from the
newspaper (I know...big deal). It uses the the Linux "words" file.
My question is: is there a similar words file for Windows, please?
As far as I know Windows doesn't i
Please post to only one of
r-help@r-project.org
r-h...@stat.math.ethz.ch
not to both, as the same list then got two copies.
On Sat, 3 Jan 2009, rkevinbur...@charter.net wrote:
I had a question about the basic power functions in R.
For example from the R console I enter:
-1 ^ 2
[1] -1
but a
Dear R People:
I have a small function that solves the "Jumble" puzzle from the
newspaper (I know...big deal). It uses the the Linux "words" file.
My question is: is there a similar words file for Windows, please?
Thanks,
Happy New (Gnu) Year.
Sincerely,
Erin
--
Erin Hodgess
Associate Profe
I had a question about the basic power functions in R.
For example from the R console I enter:
-1 ^ 2
[1] -1
but also
-1^3
[1] -1
-0.1^2
[1] -0.01
Normally pow(-1, 2) return either -Infinity or NaN. Has R taken over the math
functions? If so I would think that -1^2 is 1 not -1 and -0.1^2 is
Thank you.
You're right. I come from C and C++ programming.
I wonder whether to pass parameters to an R script I have to set environment
variables ... ?
Best regards,
Maura
-Messaggio originale-
Da: jim holtman [mailto:jholt...@gmail.com]
Inviato: sab 03/01/2009 21.12
A: mau...@alice.i
R's variable passing mechanism is not call by value, but a mixture of
unevaluated arguments (like the obsolete Lisp FEXPR) and call-by-need.
It is like FEXPR in that the function can capture the unevaluated
argument (using 'substitute'). But it is like call-by-need in that
normal use of the argum
> I don't have octave (on the same machine) to compare these with.
> And I don't have MatLab at all. So I can't provide a comparison
> on that front, I'm afraid.
> Ted.
>
Just to add some timings, I was running 1000 repetitions (adding up to
a=1001) on a notebook with core 2 duo T7200
R 2.8.1
No you can not pass an address to a function. If you want to change
the value of something, then return it as a value and assign it to the
object so you can see what is going on. Must be coming from the "C"
environment where such things are allowed and lead to a number of
problems.
If you really
On Sat, Jan 3, 2009 at 12:37 PM, Ajay Shah wrote:
>> As for jit and Ra, that was immediate reaction too but I found that jit does
>> not help on your example. But I concur fully with what Ben said --- use the
>> tool that is appropriate for the task at hand. If your task is running for
>> loops,
Dear Achim,
I suspect that the problem, involving a fifth-degree raw polynomial, is
very ill-conditioned, and that the computation in linear.hypothesis()
fails because it is not as stable as lm() and summary.lm(). (BTW, one
would not normally call summary.lm() directly, but rather use the
generic
On 03-Jan-09 18:28:03, Ben Bolker wrote:
> Ajay Shah mayin.org> writes:
>> On Sat, Jan 03, 2009 at 06:59:29PM +0100, Stefan Grosse wrote:
>> > On Sat, 3 Jan 2009 22:25:38 +0530 Ajay Shah
>> > mayin.org> wrote:
>> >
>> > AS> system.time(for (i in 1:1000) {a[i] <- a[i] + 1})
>> >
>> > AS> I w
Greetings.
I'm trying to label some points using the identify() command. The
labels and the coordinates are coming from a csv file. The file
encoding is UTF-8.
If I use labels in Latin characters, everything comes out OK. But
when I switch to using labels in Cyrillic, I get garbage.
To check tha
I have some questions about the use of lme().
Below, I constructed a minimal dataset to explain what difficulties I
experience:
# two participants
subj <- factor(c(1, 1, 1, 1, 2, 2, 2, 2))
# within-subjects factor Word Type
wtype <- factor(c("nw", "w", "nw", "w", "nw", "w", "nw", "w"))
# withi
I knowf R functions ca be called passing some parameters.
My first question is: how are parameters passed to R functions ?
Browsing through R archives I found an answer confirming taht parameters can
be passed to the called function by value. I wonder whether passing the
parameter
address is po
Hello,
I would like some help to plot a vertical line on a scatterplot build with
hexbin package.
I just need to plot a vertical line on the graph to mark a threshold value
on x axis.
It would be better if the parameter of the plot line function respect
the x axis scale.
Thanks,
Rodrigo
> As for jit and Ra, that was immediate reaction too but I found that jit does
> not help on your example. But I concur fully with what Ben said --- use the
> tool that is appropriate for the task at hand. If your task is running for
> loops, Matlab does it faster and you have Matlab, well then y
On 3 January 2009 at 23:40, Ajay Shah wrote:
| On Sat, Jan 03, 2009 at 06:59:29PM +0100, Stefan Grosse wrote:
| > On Sat, 3 Jan 2009 22:25:38 +0530 Ajay Shah wrote:
| >
| > AS> system.time(for (i in 1:1000) {a[i] <- a[i] + 1})
| >
| > AS> I wonder what we're doing wrong!
| >
| > it is no s
Ajay Shah mayin.org> writes:
>
> On Sat, Jan 03, 2009 at 06:59:29PM +0100, Stefan Grosse wrote:
> > On Sat, 3 Jan 2009 22:25:38 +0530 Ajay Shah mayin.org> wrote:
> >
> > AS> system.time(for (i in 1:1000) {a[i] <- a[i] + 1})
> >
> > AS> I wonder what we're doing wrong!
> >
> > it is no se
On Sat, Jan 03, 2009 at 06:59:29PM +0100, Stefan Grosse wrote:
> On Sat, 3 Jan 2009 22:25:38 +0530 Ajay Shah wrote:
>
> AS> system.time(for (i in 1:1000) {a[i] <- a[i] + 1})
>
> AS> I wonder what we're doing wrong!
>
> it is no secret that R does badly with loops. Thats why it is
> recommen
Ajay Shah mayin.org> writes:
>
> Here's a small R program:
>
> ---
> a <- rep(1,1000)
>
> system.time(a <- a + 1)
>
> system.time(for (i in 1:1000) {a[i] <- a[i] + 1})
> ---
On Sat, 3 Jan 2009 22:25:38 +0530 Ajay Shah wrote:
AS> system.time(for (i in 1:1000) {a[i] <- a[i] + 1})
AS> I wonder what we're doing wrong!
it is no secret that R does badly with loops. Thats why it is
recommended to use vectorized operations.
Another approach is just in time compilation
Moumita Das gmail.com> writes:
[snip snip snip]
> But how do i get significance of
> e say:--
> recmeanC1&recmeanC2 or say recmeanC1 & i1.
> I can add this in my corr function shown above but:
>
> #Finding out significance of the two items whose correlations are being
> found
> sig_value<-
John C Nash uottawa.ca> writes:
>
> I'm inclined to agree with the view that the "precision" of a generator
> should be highlighted better in the manual pages. When I do
>
> ?runif
>
> I don't see a mention, but ?.Random.seed DOES give the info, as Duncan
> points out, and it is suggested to
Here's a small R program:
---
a <- rep(1,1000)
system.time(a <- a + 1)
system.time(for (i in 1:1000) {a[i] <- a[i] + 1})
---
and here's its mat
Jim,
Thanks so much! I feel kinda stupid now. I read that part, but I
didn't really get what it was talking about... despite the fact that I am
fairly familiar with the %d syntax when setting up formatting.
Regards,
W.R.T. multiple pages, the HELP page says to use a filename like this:
png(filename = "Rplot%03d.png",
where %03d is an incremented value for each page.
On Fri, Jan 2, 2009 at 2:23 PM, Mike Williamson wrote:
> Hello all and thanks in advance for any help,
>
>There are really two issues that
I'm inclined to agree with the view that the "precision" of a generator
should be highlighted better in the manual pages. When I do
?runif
I don't see a mention, but ?.Random.seed DOES give the info, as Duncan
points out, and it is suggested to look there.
A 1-liner with each random number g
Is this of any help?
http://www.cse.unsw.edu.au/~mike/myrlibrary/geneplotter/html/histStack.html
--- On Sat, 1/3/09, Jason Rupert wrote:
> From: Jason Rupert
> Subject: [R] R Stacked Histogram
> To: r-help@r-project.org
> Received: Saturday, January 3, 2009, 12:00 AM
> I've seen this asked, b
On Fri, Jan 2, 2009 at 11:00 PM, Jason Rupert wrote:
> I've seen this asked, but never fully answered.
>
> Is it possible to plot stacked histograms in R?
>
> I have four data sets that I would like to show combined vertically in
> histogram format.
>
> Is this possible?
Yes, but it's generally
On Sat, 3 Jan 2009, Carlos J. Gil Bellosta wrote:
Why not something like
lapply(mydf, function(x) match(myarg, x) )
I don't think that is what is intended (it does not give the quoted result
in 'S'), but I don't actually know (and we were not told what 'S' this
is). My guess is that the wh
Hello,
Why not something like
lapply(mydf, function(x) match(myarg, x) )
?
Best regards,
Carlos J. Gil Bellosta
http://www.datanalytics.com
On Sat, 2009-01-03 at 07:24 -0500, Sébastien wrote:
> Dear R-users,
>
> I am translating a S script into R and having some troubles with the
> match f
Dear R-users,
I am translating a S script into R and having some troubles with the
match function. This function appears to work with vector and data.frame
in S, but not in R, e.g.:
a <- rep((1:4), each = 10)
b <- rep((1:10), times = 4)
mydf <- data.frame(a,b)
myarg <- mydf[1,]
match(myarg, my
Hello all and thanks in advance for any help,
There are really two issues that I am having, both related to saving
graphs:
1) It seems that the "dev...()" functions are unstable when using higher
level graphs (specifically I was using levelplot)
2) I have a large grid of levelplot graphs that
I have installed R-2.8.1 right now and will proceed with my tests. So
far I haven't used it.
The fault is presumably caused by a sort of misuse of the memory on my
part.
The attached R script (whose last Step is not debugged yet) implements
the algorithm for signal features extraction described in
Hi Yuzhi...I'm not sure if you company gets involve with small
project-but
I figure I send the e-mail and maybe you could point me in the right
direction.
We are a small technology research firm and we do market shares and
market sizing. We wanted to automate teh process better. We had hi
I've seen this asked, but never fully answered.
Is it possible to plot stacked histograms in R?
I have four data sets that I would like to show combined vertically in
histogram format.
Is this possible?
Thank you for any feedback you can provide.
P.S. I know I can show the four sets s
"TY" == Ted Young
on Tue, 30 Dec 2008 11:53:23 -0800 (PST)
TY>
TY> Hello,
TY>
TY> I was using garchFit {fGarch} to fit some GARCH processes.
TY> I noticed that the result contains Log Likelihood value
TY> (right above
TY> Description), but when I use @fit to ret
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