Displaying 20 results from an estimated 7000 matches similar to: "deleting column from data frame"
2010 Feb 22
3
gsub patterns from vector elements w/out loop?
Dear list,
I have two vectors:
x <- c("one","two")
y <- paste(rep(x,2),"blah")
I want to replace all occurrences of each element of x in y with
something else, so that y looks like this:
y
[1] "something else blah" "something else blah" "something else blah"
[4] "something else blah"
I can do this using a loop:
for (
2009 Oct 09
3
"Use R" -- term and logo copyright?
Dear list,
I would like to start some R workshops at King's College London, and
to do so, I would like to use the "Use R!" logo at
http://www.agrocampus-ouest.fr/math/useR-2009//useR%21%202008_fichiers/useR-middle.png
Since it seems to be difficult to get a shell account at KCL, I also went
ahead and registered use-r.org.uk and am starting to put together a
website at
2010 Nov 29
1
cross tabulate variables by subject id
Dear list,
I have data like this:
dat1 <- data.frame(subject=rep(1:10,2),
cond1=rep(c("A","B"),each=5),
cond2=rep(c("C","D"),each=10),
choice=sample(0:1,10,replace=TRUE))
I would like to compare subjects' "choice" for (cond1=="A" &
cond2=="C") vs
2011 Feb 02
1
pass nrow(x) to dots in function(x){plot(x,...)}
Dear Rers,
I have a function to barplot() a matrix, eg
myfun <- function(x, ...) { barplot(x , ... )}
(The real function is more complicated, it does things to the matrix first.)
So I can do:
m1 <- matrix(1:20,4)
myfun(m1)
myfun(m1, main="My title")
I'd like to be able to add the number of rows of the matrix passed to
the function to the "..." argument, eg
2010 Aug 24
1
Index list by other list (w/ logical elements)?
I have two lists of the same shape, like this:
x <- list()
x[[1]] <- c("one","two")
x[[2]] <- c("three","four","five")
y <- list()
y[[1]] <- c(TRUE,FALSE)
y[[2]] <- c(FALSE,TRUE,TRUE)
I would like to index x "by" y, that is, the result in this case
should be:
z
[[1]]
[1] "one"
[[2]]
[1] "four"
2009 Dec 12
1
read.csv to read output of system()?
Dear list,
I have a file that is comma delimited but contains some erroneous
non-delimiter commas. I would like to replace these commas with
semicolons and then read the correct file into R as a data frame.
I want to do this from within R, without changing the original data
file.
My current idea of how to do this would be to use system("sed ...")
and feed the result to read.csv(), but
2009 Oct 03
2
add lines() to 1st plot in layout() after calling 2nd plot()?
Dear R users,
I create a graphic with two plots side by side using layout(), like this:
layout(matrix(c(1,2),1))
plot(1:10,main="left plot")
lines(c(3:7,7:3),col="red")
plot(10:1,main="right plot")
The lines() obivously get added to the "left plot" plot.
Now, I'm trying to write a function that builds up a plot bit by bit to
then include it in a
2010 Nov 09
2
new column from column in another df
If I have a data frame where a species occupies several rows with different
phases such as (both col's ar factors):
species,phase
Populus tremula,1
Populus tremula,2
Populus tremula,3
Calluna vulgaris,1
Calluna vulgaris,2
Betula alba,1
Betula alba,2
Betula alba,3
Primula veris,1
Primula veris,2
and another df where each species only have one row:
species,growth_form
Populus tremula,tree
Acer
2009 Sep 02
1
get function to return object "name"?
Dear list,
I've written a function that plots subjects. Something like:
myplot <- function(subject) { plot(subject) }
Subjects are vectors, e.g. ...
s1 <- c(200,200,190,180)
... and plotting them works fine, e.g. ...
myplot(s1)
Now I want to have "s1" etc appear in the plot title, but I don't know
how to refer to this generically (the object "name"? I tried
2008 Oct 05
1
barchart for aggregated (sum) data in lattice?
Hi list,
I have data in a dataframe t1, with a column for different amounts
spent, a column what it was spent on, and a column with dates, from
which I create a new column with months.
Example:
amount <- rep(c(10,20,30),3)
what <- rep(c("food","books","cycling"),3)
when <- c(rep("2008-09-05",5),rep("2008-10-07",4))
t1 <-
2006 Feb 17
4
showing the integrated number by point size
Is there any function to show the points like this example of SPSS?
http://biostatistic.de/temp/reg.jpg
The point size should represent the number of data at this point.
with regards
Knut Krueger
2008 Feb 26
1
Split data.frames depeding values of a column
Hello to all
is there a function wich splits a data.frame (column1,column2,column3,....)
into
data1 <-(column1,column3....) #column2 = 1
data2 <-(column1,column3....) #column2 = 2
data3 <-(column1,column3....) #column2 = 3
...
Regards Knut
2010 Nov 09
4
help to add a new column filled with value 1
Dear All,
I have a data frame with 5 column and 201 row data. I want to add one
more column between column 1 and 2 with value of 1. So the new column
has to be the second column filled with 1. Any help will be
appreciated.
Thanks for your time.
Thanks & Rg
Mohan L
2005 Jul 12
5
High resolution plots
Is there any possibility to get high resolution plots in a windows xp
system?
I tried it with the device function png(filename =
"c:/r/highresplot%d.png",pointsize=12, res=900)
but when I try to set: width = 480, height = 480 or pointsize = 12,
the text is not scaled in the same way as the plots.
with regards
Knut Krueger
http://www.biostatistic.de
2009 Dec 23
7
String question
Hi to all
I need a string like
temp <- paste("m1","m2","m3",sep=",")
But i must know how many items are in the string,afterwards
the other option would be to use a vector
temp <- c("m1","m2","m3")
No problem to get the count of items but I must get afterwards the
string "m1,m2,m3"
No problem to build the
2009 Oct 03
1
if else statement error
Hello,
I am doing a if else statement in R. But it always comes out error such as
'unexpected symbol'
There are two variables. ini and b. when ini=1, a=3; when ini>1 and b>2,
a=3; all other situations, a=6. I don't know where it is wrong.
Here is my code
ini=3
b=4
if (ini==1) {
a=3
}
else if (ini>1 and b>2 ) {
a=3
}
else {a=6}
Thanks a
2010 Jan 31
1
Help with R in ubuntu
Dear R users:
Maybe it is a silly question, but I'm don't understand what am I doing wrong.
In a new karmik koala ubuntu installation I compile the last patched 2.10.1 version of R.
Every thing was right (I install all the dev libraries I need).
First I type:
./configure --enable-R-shlib
And I obtain:
R is now configured for i686-pc-linux-gnu Source directory: .
2010 Nov 11
2
Number above the bar?
Hi
I got an barplot, and I would like to have the exact number of the bars just
above the bars anyone know how to do this?
Sorry for bad English, and I do hope that you understand what im after.
//Joel
--
View this message in context: http://r.789695.n4.nabble.com/Number-above-the-bar-tp3037438p3037438.html
Sent from the R help mailing list archive at Nabble.com.
2005 Jul 13
3
texture in barplots?
Dear R list,
For some reason I am unable to access neither search.r-project.org, nor
http://finzi.psych.upenn.edu/ so I cannot search the archives for a possible
answer (I Googled for this but didn't find anything).
Is it possible to draw barplots using a texture instead of colors, for a black
and white printer?
TIA,
Adrian
--
Adrian Dusa
Arhiva Romana de Date Sociale
Bd. Schitu
2005 Aug 09
5
RGUI crash when opening script in XP Home enviroment
If there is a helpfile open (f.e ?glm) and it is the top window, then
an exception error occurs (closing RGUI)
when I hit the open file button.
If the helpfile is not the top window (of the RGUI) I am able to open a
new script without any error.
The RGUI is not closing complete there is a blank screen left which I
have to close with the X Button or Taskmanager
Windows XP Home - German Version