Displaying 20 results from an estimated 1000 matches similar to: "2D look up (within interval)"
2011 Mar 07
4
png inside loop
hello list! I'm sorry, I just stumbled over this strange behaviour (at
least I am not able to explain the behaviour, therefore I assume it to
be a strange behaviour):
attach(water) # I know, this is not recommended
names(water[3:10])
[1] "temp" "pH" "DO" "BOD" "COD" "no3" "no2" "po4"
for (i in
2009 Jan 09
3
create sequences from two "from" and "to" vectors
hi all,
how can I create sequences that start from a known vector, say x1 and end
with another say x2- also suppose all the sequences will be the same length.
I don't want to use a for loop
x1<-c(1,2,3,4); x2<-(3,4,5,6);
what I want is
1 2 3 4
2 3 4 5
3 4 5 6
Thanks
-----
Yasir H. Kaheil
Columbia University
--
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2008 Aug 11
2
generating a random signal with a known correlation
Hi,
How can I generate a random signal that's correlated with a given signal at
a given correlation (say 0.7)?
I've been looking at rmvnorm etc but don't seem to figure it out. Thanks
-----
Yasir H. Kaheil
Columbia University
--
View this message in context: http://www.nabble.com/generating-a-random-signal-with-a-known-correlation-tp18932541p18932541.html
Sent from the R help
2008 Apr 25
2
Ubuntu vs Mac OS X
Hi !
I have installed R-2.7.0 64-bits on a computer where the new Ubuntu
version (8.04) was installed. This computer is a 3.2 GHz Dual-core with
2 Gb of RAM.
To test how fast (I though !) this machine is, I compared two simple
matrix manipulations between Ubuntu and my laptop (a MacBook Pro 2.2 GHz
with also 2 Gb of RAM under Mac OS X 10.5.2). By the way, I install the
normal version of R
2003 Aug 19
9
Variance Computing- - HELP!!!!!!!!!!!!!!!!!!
Hello,
I am running a few simulations for clinical trial anlysis. I want some help
regarding the following.
We know trhat as the sample size increases, the variance should decrease, but
I am getting some unexpected results. SO I ran a code (shown below) to check
the validity of this.
large<-array(1,c(1000,1000))
small<-array(1,c(100,1000))
for(i in
2013 Apr 10
4
ACD problem
? Hi,
I am working on a small inbound call center solution that uses an ACD system. I might add an IVR system later on. I only have 2 extensions set up (extensions 1000 and 1001), I want the system to put new calls in a queue if both extensions are busy. I am currently subscribed with a SIP trunk provider and can successfully recieve calls. I want?to design a system where customers?can call my
2012 Jul 12
6
read.table with numeric row names
I have a text file like this
2.5 3.6 7.1 7.9
100 3 4 2 3
200 3.1 4 3 3
300 2.2 3.3 2 4
I used "r <- read.table("a.txt", header=T)"
The row names becomes X2.5, X3.6... What I need is the row names are
numeric, so I can use the row names as numbers on x-axis for plotting. e.g.
"plot(colMeans(r)~names(r))",
2005 Mar 01
1
SuSE9.2 Client to AD 2003
I have been pulling my hairs out about this for a while now. Running the
latest version of SuSE with all patches applied, I have my machine
joined to the domain no problem. But when I go to use mount -t smbfs I
get this error.
Mounting share failed, smbmnt must be installed suid root for direct
user mounts (1000,1000) smbmnt failed:1
Of course I hit Google and the list archives first before
2008 Apr 11
1
Multinomial Logit Regression
Hi all,
I have a dataset with a response variable with three categories (1, 2, 3)
and a lot of continuous variables. I'd like to make a MLR with these
variables. I've been watching the libraries nnet and zelig for this purpose
but I don't understand them well.
I use a training sample data to make the MLR.
train.set <- sample(1:1000,1000*0.7)
I have done this:
library(nnet)
net
2013 Jun 10
1
Selecting divergent colors
Hi,
I was trying to make a density plot with 13 samples. To distinguish each
sample, it would be good if each color is as different as possible from the
other colors. I could use the built in function, but that does not do more
than 8 colors and then goes back to recycling the cols. If I use a palette,
then it is really difficult to distinguish between the colors.
So, is there a way that I can
2006 Jun 05
1
Survey - twophase
Dear WizaRds,
I am struggling with the use of twophase in package survey. My goal
is to compute a simple example in two phase sampling:
phase 1: I sample n1=1000 circuit boards and find 80 non functional
phase 2: Given the n1=1000 sample I sample n2=100 and find 15 non
functional. Let's say, phase 2 shows this result together with phase 1:
...................phase1........
2009 Jan 26
0
Spectral analysis with mtm-svd Multi-Taper Method Combined with Singular Value Decomposition
Hi list,
Does anyone know if there is a library in R that does MTM-SVD method for
spectral analysis?
Thanks
-----
Yasir H. Kaheil
Columbia University
--
View this message in context: http://www.nabble.com/Spectral-analysis-with-mtm-svd-Multi-Taper-Method-Combined-with-Singular-Value-Decomposition-tp21671934p21671934.html
Sent from the R help mailing list archive at Nabble.com.
2008 May 05
2
bwplot
Hi,
I have 2 questions about bwplot in R :
1) How to change the order of my different boxes in the graph ?
2) How to rename the names of the differents boxes ? because I know
how to do that with boxplot (using names) but I do not find the
equivalent parameter in bwplot.
thanks,
C?dric
2008 May 08
1
miniscule font size on R console output
Hi,
I am having a situation where I cannot change the output size of the R
console. I have played around with the font format menu but the changes are
only reflected to the script that I type in but not to the output. Everytime
I run a script, I have to go back to font format to increase the output
script, which is currently showing up as small as the dust on my computer
screen. I have mac by
2008 May 16
2
How to extract estimates, Std. Error, t Value and Pr(>|t|) from summary
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2008 May 23
1
Question about Runuran (Triangular Distribution)
The Runuran package includes a simulation for the Triangular Distribution,
urtriang. But I didn't find an analogue of the q* functions (rnorm - qnorm,
runif - qunif), that would invert the CDF (?uqtriang).
Are there any such functions?
Alberto Monteiro
2008 May 24
1
R-Excel Macro Problem
I'm trying to write R functions into VBA code. I've done this many other
times in other documents and everything has run great. But today I keep
recieving an error message "Run-time error '1004': Application-defined or
object-defined error."
Has anyone else encountered this same error message?
I do not recieve this error in the document when running regular VBA code.
2008 May 23
1
SVD on a matix
Hi All,
I performed an svd on a matrix X and saved the first three column of the
left singular matrix U. ( I assume that they correspond to the projection of
the matrix on the first three eigen vectors that corresponds to the first
three largest eigenvalues). I would like to know how much variance is
explained by the first eigenvectors? how can I find that.
Thanks for your help
--
View this
2012 Jul 10
1
info about R arulesSequences
Hi all, I'm new with R, recently I began to use the package
"arulesSequences" but the algorithm cspade give me this error:
Error en makebin(data, file) : 'sid' invalid
when I did executed this script,
x = read_baskets("transactions.basket",sep=",",info=c( "eventID",
"sequenceID","SIZE"))
s <- cspade(x, parameter =
2012 Jul 11
2
replacing NaN for every attribute in my data
Hi,
I have a list called ds which has the following attributes:
attributes(ds)
$names
[1] "adj.r.squared" "fstatistic" "intercept" "slope"
[5] "std.error" "tstatistic"
I want to replace all the NaN is ds with 0, and after searching past posts I
found I can hardcode it like this: