Displaying 20 results from an estimated 2000 matches similar to: "For loop indicies"
2011 Jul 16
1
Max within groups
I know there's a really easy way to do this but I just can't track it down. I experimented with various apply functions but couldn't get it quite right.
I have a matrix like this:
1, 16
1, 23
1, 21
1, 6
1, 25
2, 4
2, 17
2, 45
2, 11
2, 20
and I'd like to find the max value in Column 2 (or the index to the max value) grouped by the first column. So the max for Group 1, the max for
2012 Jun 25
1
Replacing text with a carriage return
I have a comma separated data file with no carriage returns and what
I'd like to do is
1. read the data as a block text
2. search for the string that starts each record "record_start", and
replace this with a carriage return. Replace will do, or just add a
carriage return before it. The string is the same for each record, but
it is enclosed in double quote marks in the file.
2011 Dec 07
2
arules package intsallation
I'm using R version 2.13.0 (2011-04-13) on Mac OS X and I get the following error message with library(arules):
Loading required package: Matrix
Loading required package: lattice
Attaching package: 'Matrix'
The following object(s) are masked from 'package:base':
det
Error in dyn.load(file, DLLpath = DLLpath, ...) :
unable to load shared object
2013 Mar 08
1
Ports
I realise this isn't exactly an R query, but does anyone know what
ports I need to open in order to get the install package function
working? It's blocked by our University firewall.
I have been asked for the following info and I don't know where to
find it or how to get it. I guess my computer knows this info - it
knows where it's trying to connect to - but I don't
2011 Jun 24
1
Installing packages
Hi,
I am trying to install the network package at my work computer. I'm using R
version 2.12.0 (2010-10-15)
At home I can use the Package Installer, but at work this is blocked by our
firewall. What I usually do is download the Mac binary and copy it to
R.Framework/Resources/Library, but this isn't working with network. I get
the following, which I think means I have the wrong binary for
2005 Apr 13
5
Binary Matrices
I'm wanting to perform analysis (e.g. using eigen()) of binary matrices - i.e. matrices comprising 0s and 1s.
For example:
n<-1000
test.mat<-matrix(round(runif(n^2)),n,n)
eigen(test.mat,only.values=T)
Is there a more efficient way of setting up test.mat, as each cell only requires a binary digit? I imagine R is setting up a structure which could contain n^2 floats.
Thanks in advance
2012 Dec 09
2
Problem with secondary sata controller
I am having problems getting my 64-bit Debian Squeeze (Xen version 4.0, Linux Kernel 2.6.32) dom0 to recognize a harddrive connected to a secondary sata controller. My motherboard is a Gigabyte GA-X79-UP4 and has two sata controllers. The first is controlled by an Intel X79 chipset and the second is controlled by a Marvell 88SE9172 chip. During the initial install of Debian everything is fine and
2011 Sep 01
2
Automatic Recoding
I have a text file full of numbers (it's a edgelist for a graph) and I would like to recode the numbers as they are way too big to work with. So for instance the following:
676529098667 1000198767829
676529098667 100867672856227
676529098667 91098726278
676529098667 98928373
1092837363526 716172829
would become:
0 1
0 2
0 3
0 4
5 6
i.e. all 676529098667 would become
2012 Jun 22
3
removing NA from a data frame
Removing rows with NAs, using na.omit(), doesn't seem to be working for me.
Dataset:
> str ( ex10s )
'data.frame': 2189576 obs. of 5 variables:
$ LOPNR : int 58 58 58 58 64 64 64 64 64 64 ...
$ DIAGNOS: Factor w/ 173 levels "F20","F200","F2000",..: 128 128 128 128 105 105 105 160 105 105 ...
$ X_DATE : int 20060821 20061207 20080102 20090904
2011 Mar 23
1
R CMD check: building indices error
Hi guys,
I am updating a package because of data format in data folder. So I just
change an extension of a file to .txt ... nothing more.
I get this error on the R CMD check
** help
*** installing help indices
** building package indices ...
Error in read.table(zfile, header = TRUE, as.is = FALSE) :
more columns than column names
ERREUR : installing package indices failed
Note that the R CMD
2010 Jan 07
1
Quantreg - 'could not find function"rq"'
Hi all,
I'm having some troubles with the Quantreg package. I am using R
version 2.10.0, and have downloaded the most recent version of Quantreg
(4.44) and SparseM (0.83 - required package). However, when I try to
run an analysis (e.g. fit1<-rq(y~x, tau=0.5)) I get an error message
saying that the function "rq" could not be found. I get the same
message when I try to search
2005 Oct 03
4
no config file
I've tried installing wine using synaptic on ubuntu, also compiling form
source and a couple of other ways but never get a ./wine/config file ?
Any idea what I'm doing wrong?
Thanks
Jim
--
Dr. Jim Maas
james.maas@nottingham.ac.uk
This message has been checked for viruses but the contents of an attachment
may still contain software viruses, which could damage your computer system:
2012 Jul 18
3
'symbols' not plotting correct circle radii
Hi there.
I have been plotting some circles using 'symbols', with radii representing my data, but the radii looked incorrect.
It seems to happen with a single circle too:
Symbols ( 0, 0, circles = 40, xlim = c(-40, 40), ylim= c(-40, 40))
If I put a ruler up to my monitor (technology!) to compare the radius with the axes, the circle isn't radius 40; it is closer to 15...
I
2012 Oct 23
10
How to pick colums from a ragged array?
I have a large dataset (~1 million rows) of three variables: ID (patient's name), DATE (of appointment) and DIAGNOSIS (given on that date).
Patients may have been assigned more than one diagnosis at any one appointment - leading to two rows, same ID and DATE but different DIAGNOSIS.
The diagnoses may change between appointments.
I want to subset the data in two ways:
- define groups
2012 Feb 02
1
Writing out data
What is the best way to write out comma separated data, as a program
is running (rather than waiting to the end using write.csv)? At the
moment I'm doing this, but I guess it's not the most efficient. The
data is in a column in the matrix postcount, and I'm using a loop to
write out each of the 100 elements.
for (j in 1:100)
{
cat(postcount[1,j], ",", file=filename,
2005 Jul 11
3
misc3d package
Hi,
I am trying to install the misc3d package on a Windows (XP) installation of R 2.0.1 using install.packages("misc3d") but with no success. I have used this approach with other packages OK, but for misc3d I get the following output...
trying URL `http://cran.r-project.org/bin/windows/contrib/2.0/PACKAGES'
Content type `text/plain; charset=iso-8859-1' length 27996 bytes
2010 Nov 17
3
translate vector of numbers to indicies of 0/1 matrix
Hello All,
Searched around, haven't found a decent solution.
I'd like to translate a vector of numbers to a matrix (or to a list of
vectors) such that the vector values would serve as indicies of the 1's
in an otherwise-zero-filled matrix (or list of vectors). For example:
> a = c(1,3,3,4)
# perform operation
[,1] [,2] [,3] [,4]
[1,] 1 0 0 0
[2,] 0 0 1
2003 May 12
1
Plotting expressions with indicies
Hello,
I would like to plot a series of math symbols on a graph with ordered indicies
: expression(delta[1]) expression(delta[2]) etc.
Is there a mean to write this in a for loop ?
for(i in 1:6) text(i,i,expression(delta[i]))
does not work ('i' is not evaluated).
Thanks in advance,
Y. Noel
2011 Feb 26
0
Weird behavior of a 2-by-2 matrix indicies
The real weird thing is I wrote "weird" and it comes out "wired"...
The background is that I did a lot of sparse matrices calculations.
Therefore need some indices tweaks, e.g subtract a block from a big matrix.
Then I just create an indicies matrix and use it directly as a vector since
a matrix is just a vector with dimensions attributed in R. I know I can
convert them to a
2010 Sep 25
11
[Bug 30370] New: Nouveau module crashes with "divide error"
https://bugs.freedesktop.org/show_bug.cgi?id=30370
Summary: Nouveau module crashes with "divide error"
Product: xorg
Version: git
Platform: x86-64 (AMD64)
OS/Version: Linux (All)
Status: NEW
Severity: critical
Priority: medium
Component: Driver/nouveau
AssignedTo: nouveau at