Displaying 20 results from an estimated 3000 matches similar to: "vector as data.frame element?"
2009 Aug 19
2
RGoogleDocs/RCurl through proxy
Dear list,
I am trying to use RGoogleDocs, but I am connecting through a proxy server.
I know RCurl is used for the connection, which should be able to deal
with proxies and such.
How do I set this up for RCurl? And can I use those settings with
RGoogleDocs as well?
I have the name of the proxy server and the port number.
(Windows XP).
thanks,
Remko
2010 Jun 02
2
Faster union of polygons?
Dear R-helpers,
thanks for yesterday's speeding-up tip. Here is my next query:
I have lots of polygons (not necessarily convex ones, and they never
have holes) given by x,y coordinates.
I want to get the polygon that is the union of these polygons. This is
my current method, but I am hoping there is a faster method (up to
thousands of polygons, each with ca. 40 xy points).
Example:
2009 Feb 26
2
interpSpline with dates?
Dear R-helpers,
can I use a POSIXct date as the x variable in interpSpline? The help
page says x and y need to be numeric... is there a workaround?
example:
library(splines)
testdfr <- data.frame(Date=seq(as.POSIXct("2008-08-01"),as.POSIXct("2008-09-01"),
length=10))
testdfr$yvar <- rnorm(10)
sp <- interpSpline(yvar ~ Date, testdfr)
preddfr <-
2010 Mar 30
1
SHLIB not working (Win Vista)
Dear R-helpers,
I tried to build a DLL like I have done so many times, but this time
on my new machine, but it gives the erorr:
(from cmd window)
>R CMD SHLIB Boxcnt.f
MAKE Version 5.2 Copyright (c) 1987, 2000 Borland
Error c:/PROGRA~1/R/R-210~1.1/share/make/winshlib.mk 4: Command syntax error
*** 1 errors during make ***
The error is not in my Fortran file, because I also tried other files
2009 Oct 20
1
system() or shell() with python script
Hi all,
I am having some problems calling a python script from R that resides
in a folder that is in the path (WindowsXP):
> system("quickPadTool.py")
Warning message:
In system("quickPadTool.py") : quickPadTool.py not found
# I also tried 'shell' (and shell.exec as well).
> shell("quickPadTool.py")
'quickPadTool.py' is not recognized as an
2009 Jul 20
1
Problem with as.POSIXct on dates object
Dear R-helpers,
I have a problem converting an object made with the 'chron' function
to a POSIXct object:
# Make date based on DOY
dat <- chron(dates=232, origin.=c(month=1, day=1, year=2008))
dat
#[1] 08/20/08
# Converting to POSIXct uses current timezone (Sydney):
as.POSIXct(dat)
#[1] "2008-08-20 10:00:00 EST"
# Setting GMT timezone has no effect?
as.POSIXct(dat,
2009 Dec 01
4
Is there a function to test if all the elements in a vector are unique
length(unique(c(1,2,2)))==length(c(1,2,2))
I use the above test to test if all the elements in a vector are
unique. But I'm wondering if there is a convenient function to do so
in R library.
2009 Oct 19
2
Possible bug in plot.POSIXct regarding x axis
I believe I have found a bug (or at least a misfeature) in plot.POSIXct.
See the following example code.
set.seed(1)
x=seq(1,1e8,length=100)+round(runif(100)*1e8)
y=as.POSIXct(x,origin="2001-01-01")
plot(y)
This plots some random (date)times against their indices. The y axis
correctly shows appropriate values (years), but the x axis contains the
single number '59:58' in the
2009 Feb 13
2
Running examples failed (but there are none).
Dear R-helpers,
making a package (windowsXP), that includes a bunch of functions, but
none have examples (all example code is within \dontrun{} blocks).
I do R CMD check Maeswrap, all bits get OK-ed, except:
"Running examples in 'Maeswrap-Ex.R' failed."
When I run the 'Maeswrap-Ex.R' file myself, there are no problems.
Any pointers?
thanks
Remko
2011 Sep 06
2
Sweave : some comments disappear
Dear R-helpers,
when I have an R code chunk in a sweave file like this:
<<>>=
x <- 1:10
# this comment disapears
x
# this one does not!
print(x)
#mean
mean(x)
@
The first comment does not appear in the sweaved document, the second
one does. How can this be?
I have tried print=TRUE and keep.source=TRUE, but neither seem to
affect this behavior.
thanks,
Remko
2009 Aug 04
1
Build a dataframe row by row?
Hi,
Time for another of my "newbie" questions.
Is it possible to build up a data.frame "row by row" as I go
I'm going to be running a bunch of experiments (many in a loop) to test
different things. I'm using AUC as my main performance measure.
My thought was to add a row to a data.frame for each iteration and then
have a nice summary report at the end.
I found
2009 Nov 09
1
Print methods
I've built a package that contains only two functions for a test run. They are:
g <- function(x){
x <- x^2
class(x) <- "foo"
x
}
print.foo <- function(x, ...){
cat("This is a test:\n")
cat(x, "\n")
invisible(x)
}
Simply testing these functions in the R workspace prior to a build yields:
> g(1:5)
This is a test:
1 4 9 16 25
Now, I
2010 Jul 14
1
Arrange values on a timeline
I have a set of labels arranged along a timeframe in a. Each label has
a timestamp and marks a state until the next label. The dataframe a
contains 5 such timestamps and 5 associated labels. This means, on a
continious scale between 1-100, there are 5 markers. E.g. 'abc' marks
the timestampls between 10 and 19, 'def' marks the timestamps between
20 and 32, and so on.
a <-
2010 Jan 15
2
processing all files with certain extension in a directory
Hi all,
I'm trying to process all files with a certain extension "*.ext" in a
directory like this:
> R --slave --args /my/dir < dir_plot.r
where I then I want to do something like:
myarg <- commandArgs()
inputdir <- myarg[length(myarg)]
print(inputdir)
"for file with extension "*.ext in inputdir"
do
data = process.data(file)
outfile =
2009 Aug 03
2
combine venn diagram and pie chart
Hi R users,
I am wondering if it there is any R's function helping integrate venn
diagram and pie chart to compare two related datasets.
I know the package limma(bioconductor) has something built-in for making
venn diagram, but I guess it would be very painful to use line and text to
specify the proportions in the fashion of pie chart .
Thanks in advance,
Kevin Chang
--
View this
2009 Apr 24
1
Box-counting dimension and package 'fdim'
Dear R-helpers,
I am looking for an implementation of the box-counting algorithm to
estimate the box dimension of a cloud of points in 3D (aka fractal
dimension, or similarity dimension).
The package 'fdim' might be doing this, but the documentation is awful
and I don't understand what is what there.
Does anyone know of an implementation of this algorithm in R, or
elsewhere, or
2010 Jan 15
2
How to delete matrix rows based on NA frequency?
Hi all,
I would like to remove rows from a matrix, based on the frequency of missing values. If there are more than 10 % missing values, the row should be deleted.
I use the following to calculate the frequencies, thereby getting a new matrix with the frequencies:
freqNA=rowMeans(is.na(exprdata))
But is there a shorter way to remove the rows based on "(1-freqNA)>0.1"
2009 Nov 25
3
Concave hull
Dear friends,
Do you know how to calculate the CONCAVE hull of a set of points (2-
dimensional or n-dimensional)? is that possible in R? (With a "smoothing"
parameter of course).
Best,
--
Corrado Topi
Global Climate Change & Biodiversity Indicators
Area 18,Department of Biology
University of York, York, YO10 5YW, UK
Phone: + 44 (0) 1904 328645, E-mail: ct529 at york.ac.uk
2009 Nov 19
2
3D plot, rotatable and with adjustable symbols
Hi all,
I've tried to make a 3D plot, but have run into some problems.
I'd like to have a plot that I can rotate interactively using the mouse, which is possible using the plots3d {R.basic}. However, I would like to change the symbols used as the points, but there's no pch in plot3d().
If I use the Scatterplot3d package, I'm able to change this, but not able to rotate
2009 Feb 28
2
rgl persp3d bounding box color problem.
Hi guys,
I hit on a problem when I use rgl.
Could you try to run the code here in this link and see why the first persp3d gives a red bounding box and the second shows black?
http://rafb.net/p/g1i7ur33.html
(sorry for not pasting the code here directly but my previous email got filtered by this list so I suspect my code looks like spam to the spam filter)
I'm expecting black color to be