Hi all,
If we, the R community, are endeavoring to make R user friendly
(gasp!), I think that one of the first places to start would be in
setting stringsAsFactors = FALSE. Several times I've run into
instances of folks decrying R's rediculous usage of memory in
reading data, only to come to find
Robert,
I'm not exactly an expert, but here's what I think. If you have only
786 MB of RAM on your machine and you are using ~500 of it in a
session of R, that could slow things down considerably because your
machine is trying to find free blocks of memory that haven't been used
yet. I would buy
So Mike, let me ask you a question. If R runs out of RAM, does it
begin to use virtual RAM, and hence begin to swap from the hard drive?
If so, I could see how a faster hard drive would speed R up when you
don't have enough RAM...
On 6/20/07, Mike Prager [EMAIL PROTECTED] wrote:
Matthew Keller
Hi Robert,
Here's my 2 cents.
64-bit is a memory issue, not a speed issue per se. If a concern is
increasing RAM (which is important in R since objects are stored in
RAM), then you will want to get 64 bit if you plan on getting a
computer with over 4GB RAM. I'm not sure about this (someone
versions. I have no idea why the error was occurring, and can't track
it down because I don't have access to R 2.1...
Matt
On 6/13/07, Uwe Ligges [EMAIL PROTECTED] wrote:
Matthew Keller wrote:
Hi all,
I have written a script in R that simulates genetically informative
data - it is posted
Hi all,
I have written a script in R that simulates genetically informative
data - it is posted on my website and available to the public. This is
my first time to write a script for use by others and am learning that
it isn't as easy as it seems.
To the issue. My script runs fine on my machine
HI Mayte Gregory,
This is probably a question needing to be posted to r-sig-mac. A
search for this problem on that forum turns up lots of hits. I think
everyone is having these problems (which makes me pause about whether
to switch to Mac, given how much I use R). Below is a message from the
Hi Anup,
(runif(100).5)*1 #would give you 0's and 1's.
sample(rep(c(-1,1),50),100) #A bit slower I think, gives you -1's and 1's
Best,
Matt
On 4/12/07, Anup Nandialath [EMAIL PROTECTED] wrote:
Dear Friends,
I'm trying to generate a sequence of 100 observations
with either a 1 or -1.
Hi Ramon,
I've been interested in responses to your question. I have what I
think is a similar issue - I have a very large simulation script and
would like to be able to modularize it by having a main script that
calls lots of subscripts - but I haven't done that yet because the
only way I could
PROTECTED] wrote:
Matthew Keller wrote:
Hi Ramon,
I've been interested in responses to your question. I have what I
think is a similar issue - I have a very large simulation script and
would like to be able to modularize it by having a main script that
calls lots of subscripts
hi Carlos,
its not really clear what you're asking here. If all you want is to
see what entries are the same and which are different between two
matrices of the same dimensions, then this does it:
#same
m1==m2
#diff
m1 != m2
If you want to extract the ones that are the same,
indx - m1==m2
indx
Hi all,
[this is a bit hard to describe, so if my initial description is
confusing, please try running my code below]
#WHAT I'M TRYING TO DO
I'd appreciate any help in trying to speed up some code. I've written
a script that converts a matrix of integers (usually between 1-10,000
- these
. . . . . . . . . . .1.2 sort.list
12. . . . . . . . . . . .1.0 match.arg
13. . . . . . . . . . . . .0.7 eval
On 3/16/07, Matthew Keller [EMAIL PROTECTED] wrote:
Hi all,
[this is a bit hard to describe, so if my initial description is
confusing, please try running my code below
Hi Yun,
If you're asking how to place new graphic material on the same plot
(e.g., several lines/points/etc in a single x-y region), this is
covered in the Intro to R manual. E.g., you can do:
plot(x1, y1, type='p', xlim=range(x1,x2), ylim=range(y1, y2),
xlab='x', ylab='y')
points(x2, y2,
Hi Sergio,
There was a discussion on this board recently about the difficulty of
searching for R related material on the web. I think the custom
google search engine is a good idea. It would be helpful if we could
have access to the full list of websites it is indexing so that we
could make
Hi Maria,
I'm interested in the responses you get. The way I do this is to use
par(new=TRUE), which tells R not to clean the frame before plotting
the next plot. So, eg
###Overlaid plot
op - par(mar = c(5, 4, 4, 5) + 0.1, las = 2)
Bob,
Far from flaming you, I think you made a good point - one that I
imagine most people who use R have come across. The name R is a big
impediment to effective online searches. As a check, I entered R
software, SAS software, SPSS software, and S+ software into
google. The R 'hit rate' was only
Hi Mihai,
You might check out the Rmetrics bundle, available on the cran
website. I've used its fBasics library to download stock prices. Try
the yahooImport() function and the keystats() function for downloading
specific stock prices. I had to fiddle with the keystats function to
get it to work
Hi Jeff,
The way I do this is to place all the options that I want, along with
functions I've written that I always want available, into the
Rprofile.site file. R always loads this file upon startup. That file
is located in the etc/ folder. E.g., on my computer, it is at:
C:\Program
Hi usstata,
I think this will get you what you want:
mget(ls(),globalenv())
On 1/31/07, usstata [EMAIL PROTECTED] wrote:
Hi,all:
May be a pointless question
a - 1:10
b - matrix(1:8,nrow = 4)
c - letters[4:8]
……
ls()
[1] a b
Hi all,
This is probably a blindingly obvious question: Why does it matter in
the uniroot function whether the f() values at the end points that you
supply are of the same sign?
For example:
f - function(x,y) {y-x^2+1}
#this gives a warning
uniroot(f,interval=c(-5,5),y=0)
Error in uniroot(f,
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