Displaying 20 results from an estimated 2000 matches similar to: "Frequency"
2010 Sep 08
3
Regression using mapply?
Hi,
I have huge matrices in which the response variable is in the first
column and the regressors are in the other columns. What I wanted to do
now is something like this:
#this is just to get an example-matrix
DataMatrix <- rep(1,1000);
Disturbance <- rnorm(900);
DataMatrix[101:1000] <- DataMatrix[101:1000]+Disturbance;
DataMatrix <- matrix(DataMatrix,ncol=10,nrow=100);
#estimate
2011 Feb 10
3
Permuting rows of a matrix
Hi,
I need to permute the rows of a matrix, where each row is independently rearranged. A simple solution is this:
shuffled <- datamatrix <- matrix(1:24, ncol = 4)
for (i in 1:nrow(datamatrix)) { shuffled[i, ] <- sample(datamatrix[i, ]) }
> datamatrix
[,1] [,2] [,3] [,4]
[1,] 1 7 13 19
[2,] 2 8 14 20
[3,] 3 9 15 21
[4,] 4 10 16 22
[5,]
2010 Dec 07
2
longer object length is not a multiple of shorter object length
In datamatrix[, "y"] == datamatrix[, "y"][-1] :
longer object length is not a multiple of shorter object length
out = c(FALSE,datamatrix[,'y'] == datamatrix[,'y'][-1])
and I do not know why I get that error, the resulting out matrix is somehow
one row larger than datamatrix...
all I try to do is filter matrix by dropping rows where [,'y'][-1] ==
2009 May 14
3
memory usage grows too fast
Hi All,
I have a 1000x1000000 matrix.
The calculation I would like to do is actually very simple: for each row, calculate the frequency of a given pattern. For example, a toy dataset is as follows.
Col1 Col2 Col3 Col4
01 02 02 00 => Freq of ?02? is 0.5
02 02 02 01 => Freq of ?02? is 0.75
00 02 01 01 ?
My code is quite simple as the following to find the pattern ?02?.
2007 Feb 13
1
Questions about results from PCAproj for robust principal component analysis
Hi.
I have been looking at the PCAproj function in package pcaPP (R 2.4.1) for
robust principal components, and I'm trying to interpret the results. I
started with a data matrix of dimensions RxC (R is the number of rows /
observations, C the number of columns / variables). PCAproj returns a list
of class princomp, similar to the output of the function princomp. In a
case where I can
2004 Jul 13
5
Help with factanal and missing values
Hi list,
I'm performing a series of confirmatory factor analysis on different
groupings of items from data collected with questionnaires. There are some
missing values.
For those sets with no missing values I call
factanal(datamatrix,factors=n)
where datamatrix is a table of all observations for the items under
investigation.
This call fails when there are missing values.
help(factanal)
2008 Mar 03
2
handling big data set in R
Hello R users,
I'm wondering whether it is possible to manage big data set in R? I
have a data set with 3 million rows and 3 columns (X,Y,Z), where X is
the group id. For each X, I need to run 2 regression on the submatrix.
I used the function "split":
datamatrix<-read.csv("datas.csv", header=F, sep=",")
dim(datamatrix)
# [1] 2980523 3
2012 Mar 18
2
word frequency count
Hi:
I have a dataframe containing comma seperated group of words such as
milk,bread
bread,butter
beer,diaper
beer,diaper
milk,bread
beer,diaper
I want to output the frequency of occurrence of comma separated words
for each row and collapse duplicate rows, to make the output as shown
in the following dataframe:
milk,bread 2
bread,butter 1
beer,diaper 3
milk,bread 2
Thanks for help!
deb
2012 Jul 24
4
ERROR : cannot allocate vector of size (in MB & GB)
Hi,
Here in R, I need to load a huge file(.csv) , its size is 200MB. [may come
more than 1GB sometimes].
When i tried to load into a variable it taking too much of time and after
that when i do cbind by groups,
getting an error like this
" Error: cannot allocate vector of size 82.4 Mb "
My requirement is, spilt data from Huge-size-file(.csv) to no. of small csv
files.
Here i will give
2011 Nov 21
5
R ignores number only with a nine under 10000
Hello R users,
I'm trying to replace numerical values in a datamatrix with strings. R does
this except for numbers under 10000 starting with a 9 (eg 98, 970, 9504
etc). This is really weird and I wondered whether someone had encountered
such a problem or knows the solution. I'm using the next script:
test_1 <- read.table("5+ref_151111clusters3.csv", header = TRUE, sep =
2004 Apr 27
1
beginners k means clustering question
Hi all,
I am wandering.. is it possible to cluster data which is in a single
column ?
for example.. I have some data as follows:
4013
7362
7585
9304
11879
14785
21795
30500
30669
30924
33988
36975
40422
42911
50501
51593
53729
54338
55497
57337
61993
62601
66229
69815
69933
70760
71340
75921
83972
90134
91061
.
.
.
is it possible to cluster this data since it is in a single column ?
I have
2009 Jan 20
1
heatmap.2 color issue
Dear All:
I tried to use heatmap.2 to generate hierarchical clustering using the following command:
heatmap.2(datamatrix, scale="row", trace="none", col=greenred(256), labRow=genelist[,1], margins=c(10,10), Rowv=TRUE, Colv=TRUE)
datamatrix is subset of a RMA normalized data subset by a genelist.
The problem is a lot of times, the z-score in key are from, like -5 to 15 or
2012 Aug 10
1
Split CSV as per file size
Hi here i have a code to split a csv file as per group of line.
The code given below,
------------------------------------
SplitCSVByLine <- function(DataMatrix,Destination,NoOfLineToGroup)
{
input <- file(DataMatrix, "r")
fileNo <- 1
repeat
{
myLines <- readLines(input, n=NoOfLineToGroup)
if (length(myLines) == 0) break
2009 Jul 03
1
fix() and edit() not working with Rcmdr and german LANG-variable
Dear Mailinglist,
I just set up an R 2.9.1 environment with Rcmdr 1.4-6 on Ubuntu Jaunty
9.04. As I'm from Germany my $LANG variable is set to "de_DE.UTF-8".
Now, when I open up Rcmdr and try to edit a new datamatrix there is no
edit window appearing:
Datenmatrix <- edit(as.data.frame(NULL))
ERROR: invalid device
In addition, there are plenty of warning messages in the
2005 Jan 16
10
Any interest in a Canadian Asterisk mailing list?
Just on the off chance that Canadian Asterisk users might be
interested in a place to discuss topics specific to the "great
white north" (sources, services, telcos, etc.), I created
the asterisk-canada mailing list:
http://lists.syonex.com/mailman/listinfo/asterisk-canada
or
asterisk-canada-subscribe@lists.syonex.com
Cheers!
John
2010 Dec 17
4
Changing a value in a particular row and column within a text file
Dear list,
I need to change a value within a particular line of a plain text file
with characters and numbers, and I haven't found any way of doing this
by using R.
What I have a is a file that doesn't have tabular data (so, I think
that 'read.table' or 'read.delim' are not the right tools for this),
but some text, and I now exactly the row that has to be modified and
the
2018 Nov 29
2
virsh console and other language keymaps
Hi,
I've got a small vm server running kvm + libvirt, and I made a simple shell script that allows users to ssh in and control their vms (power off, etc). However, one of my users uses the french canadian keyboard layout on her home computer, and upon being told "escape character is ^]" expected to need to press ctrl+right-alt_] (] being in the same location it is on a US keyboard).
2006 Jun 29
1
kmeans clustering
Hello R list members,
I'm a bio informatics student from the Leiden university
(netherlands). We were asked to make a program with different
clustering methods. The problem we are experiencing is the following.
we have a matrix with data like the following
research1 research2 research3 enz
sample1 0.5 0.2 0.4
sample2 0.4
2013 Apr 03
7
Canadian politcal party colours in ggplot2
A stupid question but does anyone know how to express the actual colours used by the main Canadian political parties? I want to do a couple of ggplot2 plots and have lines or rectangles that accurately reflect the party colours.
I can probably play around with RColorBrewer or something to figure it out but if some some already has got them it would save me some time especially with the NDP
2003 Nov 12
2
Canadian VoIP termination?
Hi,
Does anyone know of Canadian VoIP termination providers? I have
Canadian customers and would like to provide Canadian dial in and dial
out (canadian callerid).
Thanks!