Displaying 20 results from an estimated 500 matches similar to: "Subset: data frames and factor levels"
2008 Mar 18
7
download.file()
Hi,
I wanted to download a file and did the following:
---------------------------------------------------------
> fileLink <- 'ftp://ftp.ncbi.nih.gov/pub/geo/DATA/supplementary/series/GSE1000/GSE1000_RAW.tar'
> download.file(fileLink,'/geoDat')
trying URL 'ftp://ftp.ncbi.nih.gov/pub/geo/DATA/supplementary/series/GSE1000/GSE1000_RAW.tar'
ftp data connection made,
2008 Mar 18
2
read.dta for files from stata 9.0
Dear R-helpers,
if I want to read a .dta-file generated by stata 9.0 with read.dta
(foreign), I get the message
"not a stata version 5-8 .dta-file". I'm using R-2.6.2 and the latest
version of the foreign package. Has someone any hint?
With many thanks,
Albrecht
2008 Mar 26
1
GNUplot to R conversion?
Hi,
I have some scripts creating GNUplot graphs that I would like to
convert to R. It would be a great help if there would be a
reasonable converter that takes over plot commands and initial
settings and put these into R commands (I'm an R beginner and
thus this kind of Kickstart would be helpful).
Remark: Asking Google for "gnuplot to R conversion" or similar things
does not
2008 Apr 02
3
Nonlinear equation
Dear R Users,
I'm trying to find function that allow me to solve one nonlinear equation. Functions that I found are good for optimization problems.
Any suggestions are welcome,
rob
2008 Mar 13
1
smoothest way to upgrade R, say from 2.6.1 to 2.6.2?
Like many software assemblies, R is updated frequently. Also, it
creates its own release-numbered directory when it is installed.
Packages get dumped into the subdirectory "library". I have a personal
habit of storing documents related to R packages in the "doc"
subdirectory.
Here are my questions.
(1) How do people manage an upgrade, from 2.6.1, say, to 2.6.2? 2.6.2
will
2008 Mar 11
2
(no subject)
# PROBLEM WITH ABLINE
# I have a question about a seemingly imprecise abline figure which I have
come accross now a few times.
# After reading variables a and b...
a<-c(3729,1796,1956,5177,3201,3138,4265,3042,3745,2060,5713,6811,4184,1221,4700,3171,8913,5565,5500,2428,4841,10428,11197,5946,2783,4842)
2009 Jul 24
3
str(data.frame) after subsetting reflects original structure, not subsetted structure?
I find that after subsetting (you may prefer "conditional selection") a data
frame and assigning it to a new object, the str(new object) reflects the
original data frame, not the new one:
A <- rnorm(20)
B <- factor(rep(c("t", "g"), 10))
C <- factor(rep(c("h", "l"), 10))
D <- data.frame(A, B, C)
str(D) # reports correctly
E <-
2013 Mar 07
13
[Bug 61953] New: arbitrary memory access corrupts kernel memory, eventually crashing the kernel
https://bugs.freedesktop.org/show_bug.cgi?id=61953
Priority: medium
Bug ID: 61953
Assignee: nouveau at lists.freedesktop.org
Summary: arbitrary memory access corrupts kernel memory,
eventually crashing the kernel
QA Contact: xorg-team at lists.x.org
Severity: major
Classification: Unclassified
OS:
2007 Dec 09
2
adjusting "levels" after subset a table
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2009 Mar 21
0
Solved: [Fwd: Matching failure in merge()]
I've found where the problem was and a way to solve this problem:
One dataset was encoded (and read) as UTF-8
and the other one was encoded (en read) as latin3
In this case, even if at the terminal you see
the same characters, R states that the two
elements are not equal.
Don't know if this is the way it has to be,
or this is a bug.
Anyway, editing the second file (encoded as latin3)
2009 Aug 07
3
bug with subset and plot?
Hi!
I have the following problem that I beleive is a bug:
I have a dataframe with one categorical and one numerical vector. The
categorical vector has three levels (uc, up and vc). A plot of the
vectors with the categorical vector on the x-axis gives a boxplot with
three boxes - exactly as expected.
If I then use the subset function to make a dataset that only includes
two of the levels of
2005 Nov 07
1
reduce levels
Hi all:
I have an example that shows my problem:
> test <- data.frame(c("a", "b", "c"))
> colnames(test) <- "mm"
> sub <- subset(test, mm=="b")
> sub$mm
[1] b
Levels: a b c
> levels(sub$mm)
[1] "a" "b" "c"
How can I reduce the levels to exclusively those which
2009 May 27
2
Factor level with no cases shows up in a plot
Consider this data structure (df1) ...
Group Year PctProf FullYr
1 Never RF 2004 87 88
2 Cohort 1 2004 83 84
3 Cohort 2 2004 84 86
4 Cohort 3 2004 87 87
5 Cohort 4 2004 73 74
6 Never RF 2005 85 86
7 Cohort 1 2005 81 82
8 Cohort 2 2005 81 81
9 Cohort 3 2005 78 79
10 Cohort 4 2005 72 74
11
2009 Nov 10
3
drop unused levels in subset.data.frame
Dear list,
subset has a 'drop' argument that I had often mistaken for the one in
[.factor which removes unused levels.
Clearly it doesn't work that way, as shown below,
d <- data.frame(x = factor(letters[1:15]), y = factor(LETTERS[1:3]))
s <- subset(d, y=="A", drop=TRUE)
str(s)
'data.frame': 5 obs. of 2 variables:
$ x: Factor w/ 15 levels
2007 Jul 24
1
Renamig a factor
Which is the proper way to rename a factor?
If I do:
test$Parc[test$Parc=="Ol?rdola"]<-"Ol?rdola"
R complains that
Warning message:
invalid factor level, NAs generated in: `[<-.factor`(`*tmp*`, test$Parc
== "Ol?rdola", value = "Ol?rdola")
Thanks
Agus
--
Dr. Agustin Lobo
Institut de Ciencies de la Terra "Jaume Almera" (CSIC)
LLuis Sole
2008 Apr 18
1
space between plots
I've set
layout(matrix(c(1,3,2,4),ncol=2))
and
par(mar=c(0, 4, 4, 0) + 0.0) and
par(mar=c(0, 0, 4, 3) + 0.0)
for the upper-left and upper-right plots, but
still get an space between both plots,
is there any way to completely eliminate that space?
Thanks
Agus
--
Dr. Agustin Lobo
Institut de Ciencies de la Terra "Jaume Almera" (CSIC)
LLuis Sole Sabaris s/n
08028 Barcelona
Spain
2009 Jul 03
4
Function to eliminate blank space within strings?
Is there an specific function
to eliminate blank space within
strings?
Thanks
--
Dr. Agustin Lobo
Institut de Ciencies de la Terra "Jaume Almera" (CSIC)
LLuis Sole Sabaris s/n
08028 Barcelona
Spain
Tel. 34 934095410
Fax. 34 934110012
email: Agustin.Lobo at ija.csic.es
http://www.ija.csic.es/gt/obster
2009 Sep 02
1
Problem at subsetting matrix by using dimnames
Given:
> mitest <- matrix(1:16,ncol=4)
> dimnames(mitest)[[1]] <- c("a","b","c","d")
> dimnames(mitest)[[2]] <- c("a","b","c","d")
> mitest
a b c d
a 1 5 9 13
b 2 6 10 14
c 3 7 11 15
d 4 8 12 16
I can do:
> mitest[cbind(c(1,2,3),c(2,3,2))]
[1] 5 10 7
but using the names does not
2008 Jul 28
1
Converting from char to POSIX:
Given char vector delme2:
> str(delme2)
chr [1:1065] "30-1-08 8:48:21" "30-1-08 8:55:17" "30-1-08 9:00:22" ...
I do:
> delme3 <- strptime(delme2,format="%d-%m-%y %H:%M:%S")
But then:
> str(delme3)
POSIXlt[1:9], format: "2008-01-30 08:48:21" "2008-01-30 08:55:17" ...
> length(delme3)
[1] 9
whie
>
2008 Dec 04
0
reading files (readOGR) and non-ascii characters
I'm forwarding to this list as I've got no
answer in [R-sig-Geo] and perhaps this
issue is not exclusive of readOGR()
I'm using ubuntu 8.04 andR version 2.8.0 (2008-10-20)
-------- Original Message --------
Subject: readOGR and non-ascii characters
Date: Wed, 03 Dec 2008 14:22:34 +0100
From: Agustin Lobo <aloboaleu at gmail.com>
Reply-To: Agustin.Lobo at ija.csic.es
To: