Displaying 20 results from an estimated 1100 matches similar to: "Embedding lists in matrices and matrices in lists"
2007 Aug 18
2
Problem with lsa package (data.frame) on Windows XP
Dear R team,
The following piece of code (to use the lsa package) works fine on my
mac os x, but when I run the same code on Windows XP, it doesn't work
any more.
### code:
library("lsa")
matrix1 = textmatrix("C:\\Documents and Settings\\tine stalmans.TINE.
000\\LSA\\cuentos\\", stemming=TRUE, language="spanish",
minWordLength=2, minDocFreq=1,
2012 Sep 04
2
Read data from .csv file as a matrix and compare the different between two matrix
Hi,
I have two table matrix, and I would like to compare the different between
two matrix.
For example:
Matrix 1:
A B C
A 0 1 0
B 0 0 1
C 0 0 0
Matrix 2:
A B C
A 0 1 0
B 0 0 0
C 0 0 0
Each column which have value 1, should also return value 1. As in this
case/example, the result should appear like this (as below). The result of
this differentiation should also be in matrix
2010 Feb 22
1
rownames cannot allocate vector of size
Hi,
On R 2.10.1 for Windows, when I do the following to duplicate the
structure of a large numeric matrix called matrix1:
matrix2 <- matrix(0,nrow=nrow(matrix1),ncol=ncol(matrix1))
and then
rownames(matrix2) <- rownames(matrix1)
I get a "cannot allocate vector of size xxMb" error
but if I instead do:
rnames <- list()
rnames <- rownames(matrix1)
matrix2 <-
2007 May 04
2
Get the difference between two matrices with different length
Hello,
I have got two matrices with different length. The matrices have 3
columuns. The first two are coordinates. The third is a measurement.
Now I want to get a subtraction between every single value of the
third column (between matrix1 and matrix2), but only if the two
first coordinates in matrix1 and matrix2 are the same.
I tried "FUN=?" in aggregate and ave, but I don't know
2007 Nov 19
6
Reg : using two different matrix : how to do t.test
I have two matrix with same dimensions. I want to do t.test using each column from 2 different matrix.
Row n Column names in both matrix are same.
e.g.
Matrix1
id VC1 VC2 VC3
R 1 2 3
R1 4 5 6
R3 7 8 9
Matrix2
id VC1 VC2 VC3
R 10 11 12
R1 13 14 15
R3 16 17 18
want to do t.test using each column (with same name ) using Matrix1 and Matrix2
for eg
2010 Oct 23
1
bind matrices by row
Hi R-users
I have a series of matrices and I would like to bind them together by
column using a loop (i.e. not writing cbind(matrix1,
matrix2,matrix3....)). The reason is because in my real data set I have
a very large number of matrices.
Example:
matrix1 <- matrix (1:12,4,3)
matrix2 <- matrix (13:24,4,3)
matrix3 <- matrix (25:36,4,3)
matrix4 <- matrix (37:48,4,3)
2012 Sep 19
4
correlating matrices
Hi,
thank you for taking the time and reading my question. My question is
twofold:
1. I have several matrices with variables and one matrix with water levels.
I want to predict the water level with the data in the other matrices.
Basically,
* mod<-lm(matrix1 ~ matrix2+matrix3)*
( What looks like a minus is meant to be the wiggly minus.)
Of course I could dissemble the matrices and paste
2012 Aug 02
1
Filter a matrix with a matrix HELP!
Hi,
just during these vacation days, I'm trying to approach with multicore
package
and I have some troubles with foreach.
What I'm trying to do is to extract a data in coordinate (ii,jj) from a
matrix2,
only if the data in the same coordinate in matrix1 is ==1.
Make this with a nested "for" take a lot of time because I have thousand of
values.
ex.
Binary_hex = NULL
2004 Feb 24
2
matrix() Help
I have a question related to matrix().
The code below randomly generates 3 Poisson numbers into a 3 by 1 matrix:
> matrix1 <- matrix(rpois(3,lambda=2),nrow=3,ncol=1)
And I use list() to see what they are:
[,1]
[1,] 3
[2,] 1
[3,] 4
, which is what I had intended.
I then I want to randomly generate y Normal numbers into a 3 by 8 matrix. y in this case would be 3, 1, and 4; so
2010 Feb 10
2
system.time provides inaccurate sys.child (PR#14210)
Full_Name: Manuel L?pez-Ib??ez
Version: R version 2.6.2 (2008-02-08)
OS: linux-gnu
Submission from: (NULL) (164.15.10.156)
This is only relevant for CPU intensive child processes. Otherwise, the problem
is not obvious.
Therefore, we need a CPU intensive program like this one:
/************************************/
/*** Compile with: gcc -o timer-test -O0 timer-test.c -lm */
#include
2010 Jan 08
2
How to Merge based on Rows
Let's say that I have a bunch of matrices.
They look like this (pardon using fruit for examples, my actual data tables
are far too enormous):
Matrix1
Apples Oranges Pears
A 5 6 7
B 5 3 4
C 8 9 10
D 11 13 14
E 15 3 8
F 1 4 5
2007 Nov 19
1
using two different matrix : how to do t.test
I have two matrix with same dimensions. I want to do t.test using each column
from 2 different matrix.
Column names in both matrix are same.
e.g.
Matrix1
id VC1 VC2 VC3
R 1 2 3
R1 4 5 6
R3 7 8 9
Matrix2
id VC1 VC2 VC3
R 10 11 12
R1 13 14 15
R3 16 17 18
want to do t.test
for eg t.test(Matrix1$VC1, Matrix2$VC1)$p.value
What is the best way to do it. I have dataset with
2007 Nov 21
1
How to select rows with identical index from two matrix?
Dear list,
I have two martix like these, each rows with name in the matrix.
I try to select rows with identical name from two matrix and calculate their correlation.
Matrix1:
2-Sep 9 5.5 1 7.18 10.0 8 139.45
2-Sep 7 4.9 15 8.22 61.68 9 123.62
4-Sep
5-Sep
AAMP
A2M
A2M
.
.
.
Matrix2:
2-Sep 4 7 1 6.8 12 8 19.4
2010 Mar 18
1
How to match two matrices with different dates
Dear R users,
I am experiencing a problem, I am trying to merge two matrices composed like
this:
Matrix1 :
Col1 datetime // Col2 Data1
Matrix2:
Col1 datetime // Col2 Data2
The datetime are matching most of the time, but on both matrices, there are
some values missing, and this generates a gap, so the two matrices don't
match.
Do you know which function I could use/create in order to
2011 Nov 02
1
problem with merging two matrices
Dear all,
I hope you can forgive me my stupid questions, but I am a very new R user (;
So, this is my question:
I have two matrices,
those are:
matrix1 <- matrix(cbind(vector1, vector2), 1,2, dimnames = list(c("values"),
c("T value",
"p value")))
matrix2 <- matrix(dcbind,2,6,dimnames =
2009 Jul 27
1
Cross-validating two matrices
Hello,
I am trying to help a colleague with an R problem (see below) to whit
I can only generate a very inelegant solution. Any advice would be
welcome.
Thanks,
Brian
If you have two matrices, say a species by trait matrix (Matrix 1
below) and a plot by species matrix (Matrix 2 below), is there a
straightforward way to prune one matrix so that the species list
matches those in a
2012 Oct 26
4
Merge matrices with different column names
A general question that I have been pursuing for some time but have set
aside. When finishing some analysis, I can have multiple matrices that
have specific column names. Ideally, I would like to combine these
separate matrices for a final output as a csv file.
A generic example:
Matrix 1
var1A var1B var1C
x x x
x x
2013 Mar 01
2
issue creating a subset
I'm performing item response theory with eRm packages
I am excluding the persons that doesn't fit in the infit/outfit persons.
for that I created a condition. then I have to create a new subset or
matrix but with the condition.
So:
ORIGINAL
matrix<-cbind(item1, item2, item3, item4)
IF I PERFORM A head(matrix)
item1 item2 item3 item4
3 2 3 1
3 1
2011 Jun 05
2
kronecker sum
Dear All,
Could someone please suggest how to find the Kronecker sum of two 2x2
matrices,
i.e. given two matrices:
-A A
a -a
and
-B B
b -b
I need:
-A-B A B 0
a -a-B 0 B
b 0 -A-b A
0 b a -a-b
Many thanks,
Lara
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2009 Feb 26
0
How do I retrieve column and row names after comparing two matrices?
Hello, I have two matrices as shown below:
Matrix 1
ID AB1 BC1 CD1 ...
name1 1,1 2,1 0,2 ...
name2 2,0 1,2 1,2 ...
name3 0,2 1,1 2,0 ...
name4 2,0 0,2 0,2 ...
Matrix 2
ID AB2 BC2 CD2 ...
name1 1,1