Displaying 20 results from an estimated 3000 matches similar to: "Arrange elements on a matrix according to rowSums + short 'apply' Q"
2006 Jul 06
3
Comparing two matrices
hi:
I have matrix with dimensions(200 X 20,000). I have
another file, a tab-delim file where first column
variables are row names and second column variables
are column names.
For instance:
> tmat
Apple Orange Mango Grape Star
A 0 0 0 0 0
O 0 0 0 0 0
M 0 0 0 0 0
G 0 0 0 0 0
S 0 0 0 0 0
2006 Jul 06
3
Comparing two matrices [Broadcast]
It might be a bit faster to do matrix indexing:
R> tbm <- as.matrix(tb) # turn it into a character matrix
R> tmat[cbind(match(tbm[,2], rownames(tmat)), match(tbm[,1],
colnames(tmat)))] <- 1
> tmat
Apple Orange Mango Grape Star
A 1 1 1 0 0
O 1 1 0 0 0
M 0 0 1 0 0
G 0 0 0 0 0
S 1 1 1 0
2000 Apr 05
2
My first R-program
Sorry, I pasted the wrong file in earlier... this is the correct one:
pValCalculator(b, n=20, m=20)
{
ind <- 1:min(c(n,m))
prob <- (1-pnorm(b,sd=std*sqrt(ind)))
prob1 <- sum((n-ind+1)*(m-ind+1)*prob)
prob1
}
inputData <-
scan("/users/lvssso/projects/LAMA/output/pValLamaScore.tmp", list(block1
= "",block2 = "",width1 = 0,width2 = 0,alignment = 0,score
2002 Mar 18
2
persp(): add second plane (second, long question)
Thank you for your replies so far.
Sorry for bothering you again, but I'm still not able to get what I need as
I don't understand all parts of the replies (just using R for easy
things....).
Is there a code for plane3d() like some of you sent me for points3d()? I was
not able to get that out of the scatterplot3d package...
What I can do is to get the x,y and z-range for the xlim,ylim and
2006 Mar 25
2
pairwise combinatons of variables
Dear WizaRds,
although this might be a trivial question to the community, I was unable to
find anything solving my problem in the help files on CRAN. Please help.
Suppose I have 4 variables and want to use all possible combinations:
1,2
1,3
1,4
2,3
2,4
3,4
for a further kmeans partitioning.
I tried permutations() of package e1071, but this is not what I need. Thank you
for your help and
2005 Sep 09
2
Question about plotting discontinuous data
Hi, I have a simple question that I just cannot figure out. I
have 2 corresponding columns of data, one column (X-axis) for
time (formatted thus: 8:30:01am = 830.1, 12:30:05pm = 1230.5,
and one column (Y-axis) for values.
When I attempt to plot the data using something like
plot(inputdata[,1],inputdata[,2],type="l");
I get breaks in the plot (since the time essentially jumps
from
2009 Oct 14
2
attach
Hi all,
I have a question regarding the memory usage for the attach function.
Say I have a data.frame inputdat that I create with read.csv.
I would like to know what happens on the memory side when I use
attach(inputdata)
Is there a second allocation of memory for inputdata?
Then I'm using eval on a expression which depends on the columns of
inputdata. Is it better not to use attach
2005 Apr 08
2
DLL Memory Problem
Hello,
I have created a .dll file using G77 and MinGW on my PC (Windows
2000). After using dyn.load to bring it into R2.0.1, I then call the .dll
through the function ccprox shown below. It returns the correct
values. If I run it a second time though it returns different values, so
it seems something is being placed oddly in memory.
If I unload and reload the .dll it works again the first
2003 Feb 21
5
Problem Writeing a pipe using R (stdin is consumed)
Hi everybody,
I a, trying to use R as a pipe like this:
cat inputData | R --silent RCommandFile >outputData
The RCommandFile would contain something like readLines(stdin()).
I have tryed various things and none did work cleanly.
One possible solution is to use the pipe() function inside R and to pass in the "cat inputData" however this is not very convenient
since I would like to
2018 Apr 12
2
R Timeseries tsoutliers:tso
Hello,
Writing to seek help in regard to some unexpected performance anomaly i am
observing in using tsoutlers:tso on the mac vs on an AWS cloud server..
I am running the following code with very small dataset of about 208
records.
d.dir <- '/Users/darshanpandya/xxxxxx'
FNAME <- 'my_data.csv'
d.input <- fread(file.path(paste0(d.dir,"/zzz/"),FNAME,fsep =
2013 May 17
1
[LLVMdev] Alignment attribute of function arguments
Hello everyone,
Hopefully a simple question. How can I access function argument alignment
information? If my code has something like this:
void foo(short * __restrict __attribute__ ((aligned(8))) InputData){}
...as I deal with argument (InputData) can I get the alignment info set for
it?
Thanks!
Sergei
---
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by
2000 Aug 29
4
short way
i want to replace certain values of a matrix.
i know how to replace them when the values are in a vector.
i tried the same way for a matrix and got this answer:
la[la==0]<-1
Error in [<-.data.frame(*tmp*, la == 0, value = 1) :
matrix subscripts not allowed in replacement
i found a way to do this with "for()",
but i think this is the worst way to do it.
So is there a
2010 Oct 07
1
model.frame deficiency
The model.frame function has trouble with a certain type of really long
formula. Here is a test:
tname <- paste('var', 1:50, sep='')
tmat <- matrix(rnorm(500), ncol=50, dimnames=list(NULL, tname))
tdata <- data.frame(tmat)
temp1 <- paste( paste(tname, tname, sep='='), collapse=', ')
temp2 <- paste("~1 + cbind(", temp1, ")")
2011 Jan 17
2
Difficult with round() function
Dear list,
I'm writing a function to re-grid a data set from finer to coarser
resolutions in R as follows (I use this function with sapply/apply):
gridResize <- function(startVec = stop("What's your input vector"),
to = stop("Missing 'to': How long do you want the fnial vector to be?")){
from <- length(startVec)
shortVec<-numeric()
tics <- from*to
2018 Apr 13
0
Fwd: R Timeseries tsoutliers:tso
Hello,
Writing to seek help in regard to some unexpected performance anomaly i am
observing in using tsoutlers:tso on the mac vs on an AWS cloud server..
I am running the following code with very small dataset of about 208
records.
d.dir <- '/Users/darshanpandya/xxxxxx'
FNAME <- 'my_data.csv'
d.input <- fread(file.path(paste0(d.dir,"/zzz/"),FNAME,fsep =
2009 Nov 19
1
problem post request with RCurl
Hi, I am trying to use a CGI service (Pubchem PUG) via RCurl and am
running into a problem where the data must be supplied via POST - but
I don't know the keyword for the argument.
The data to be sent is an XML fragment. I can do this via the command
line using curl: I save the XML string to a file called query.xml and
then do
curl -d @query.xml
2003 Oct 31
2
Summing elements in a list
Hi,
Suppose that I have a list where each component is a list of two
matrices. I also have a vector of weights. How can I collapse my
list of lists into a single list of two matrices where each matrix
in the result is the weighted sum of the corresponding matrices.
I could use a loop but this is a nested calculation so I was hoping
there is a more efficient way to do this. To help clarify,
2017 Jun 04
0
New var
Since the number of choices is small (6), how about this?
Starting with Jeff's initial DFM:
DFM <- structure(list(obs = 1:6, start = structure(c(16467, 14710, 13152,
13787, 15126, 12696), class = "Date"), end = structure(c(17167,
14975, 13636, 13879, 15340, 12753), class = "Date"), D = c(700,
265, 484, 92, 214, 57), bin = structure(c(6L, 3L, 5L, 1L, 3L,
1L), .Label
2001 Jul 17
2
cmdscale in package mva (PR#1027)
Full_Name: Laurent Gautier
Version: 1.3.0-patched
OS: IRIX 6.5
Submission from: (NULL) (130.225.67.199)
Hello,
The function La.eigen, called by cmdscale in the package mva behaves an
unexplicable way (for me).
The following lines show what happened.
I tried the very same on linux, and it worked fine.
>a <- matrix(c(1,2,3,2),3,3)
>a
[,1] [,2] [,3]
[1,] 1 2 3
[2,]
2011 Mar 11
1
Easy 'apply' question
Dear list,
I couldn't find a solution for this problem online, as simple as it seems.
Here's the problem:
#Construct test dataframe
tf <- data.frame(1:3,4:6,c("A","A","A"))
#Try the apply function I'm trying to use
test <- apply(tf,2,function(x) if(is.numeric(x)) mean(x) else unique(x)[1])
#Look at the output--all columns treated as character