Displaying 20 results from an estimated 1000 matches similar to: "ERROR : cannot allocate vector of size (in MB & GB)"
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
2012 Aug 17
8
Get the filename from the given path
Hi,
Here i have a file path,
for eg : -
FPath <- "D:\\MyFolder\\MyFile.txt"
HOW IS POSSIBLE TO GET THE FILE NAME FROM THIS GIVEN PATH ?
- thanks in advance
Antony.
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2012 Jul 13
3
Column create and Update using function
Hi,
here i have a Max and Min values
Min <-3
Max <-6
and also a matrix like this,
ABC XYZ PQR
------ ------- -------
2 4 3
5 4 8
7 1 3
In this i need to check each particular column values are between Max and
Min value.
If the coulmn value not coming between Max and
2012 Sep 11
5
Searching from Dataframe.
Hi,
i have a dataframe containing some values.
for eg:-
MyDataFrame<-
Name Age Place
------- ------ -----------
Aby 12 USA
Raj 25 UK
Romi 32 ENG
Amy 31 IND
My requirement what is, i have a search key word[it should search from all
the columns], that i need to find out from this dataframe. If search keyword
found , it
2013 Mar 07
2
Read Content from URL to XML format
Hi,
i want to know how to read a table values from a URL and get it as XML
content.
Could anyone please help me out ASAP ?
Thanks,
Antony.
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2012 Sep 13
2
Remove serial number column in a Dataframe into CSV
Hi,
i have an small doubt.
How can we remove serial-number column while writing a dataframe in to a csv
file ?
for eg:-
write.csv(MyDataFrame,"c:/MyData.csv")
name place
----------- -----------
1 antony uk
2 john usa
3 arjun ind
here, in the csv file, serial number column is coming extra on the left-end
side.
i want to remove
2012 Aug 28
3
Get variable data Reading from the list
Here i have a variable
MyVar <- data.frame(read.csv("D:\\Doc.csv"))
And now i am storing this variable name into a list.
MyList <- list()
MyList [length(MyList )+1]<- "MyVar"
Now what is the requirement is,
i need to call the variable name "MyVar" from the list "MyList " and get
the data.
2012 Jul 11
4
MODE , VARIANCE , NTH PERCENTAILE
Hi,
Here i have an matrix like this,
ABC PQR XYZ MNO
------ ------- ------ --------
3 6 7 15
2 12 24 15
20 5 1 2
25 50 15 35
i need to get the
"MODE" - for each column-wise
"VARIANCE" - for
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 May 30
3
Separate Array Variable Content
Hi,
I am new in R,
i have a matrix like this
MyMatrix <-
*ABC PQR XYZ*
10 20 30
40 50 60
70 80 90
And, i have an array containing some conditions like this,
MyArray <- c("*ABC*>50","*PQR*<50","*ABC*<30 &* XYZ*<40")
"ABC>50"
"PQR<50"
"ABC<30 & XYZ<40"
2014 Sep 07
0
format(object.size(...), units): KB, MB, and GB instead of Kb, Mb, and Gb?
I cannot remember if this has already been discussed or not, and I'm a
bit worried I'm throwing off an endless debate. If it's already
settled, no need to discuss it further.
TOPIC #1:
Shouldn't R use KB, MB and GB when reporting on sizes kilobytes,
megabytes and gigabytes? More specifically, format() for object_size
objects (returned by object.size()) uses Kb, Mb and Gb, which
2004 Mar 04
1
how to create NTConfig.POL?
Is there a way to create an NTConfig.POL file without having access to an
NT4, w2k or w2k3 server?
Is there a way to do it in linux? Or a winxp/9x workstation?
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 =
2012 May 25
4
Hash Table - Select and Change Data iniside Matrix
Hi,
Here i have been a matrix like this,
*NAME AGE PALCE TRUE/FALSE*
ABC 20 INDIA
XYZ 30 FRANCE
PQR 40 USA
MNO 30 KENIYA
DEF 25 AUSTRALIA
Here,* TRUE/FALSE* Column containing empty values.
So my requirement what is , need to change all the *TRUE/FALSE *column value
into "*TRUE*" where *AGE =