Displaying 20 results from an estimated 3000 matches similar to: "plot.POSIXct uses wrong x axis (PR#14016)"
2009 Nov 25
1
Kerning issues with CairoPDF
Dear list members
I'm using CairoPDF to generate PDF (because of its font embedding and
support for transparent colours). However, at least on my (Windows)
system, the text it outputs seems to have completely wrong kerning.
Here's an example:
CairoPDF("test.pdf")
plot(rnorm(100),xlab="Ovreset")
dev.off()
The v is (slightly) too far away from the O, it's much
2009 Dec 10
2
R on Windows crashes when using certain characters in strings in data frames (PR#14125)
Full_Name: Karl Ove Hufthammer
Version: 2.10.0
OS: Windows XP
Submission from: (NULL) (93.124.134.66)
I have found a rather strange bug in R 2.10.0 on Windows, where the choice of
characters used in a string make R crash (i.e., Windows shows a dialogue saying
that the application has a problem, and must be closed).
I can reproduce the bug on two separate systems running Windows XP, and with
2009 Dec 14
0
R on Windows crashes when using certain characters in strings (PR#14137)
On 10/12/2009 4:20 AM, karl at huftis.org wrote:
> Full_Name: Karl Ove Hufthammer
> Version: 2.10.0
> OS: Windows XP
> Submission from: (NULL) (93.124.134.66)
>
>
> I have found a rather strange bug in R 2.10.0 on Windows, where the choice of
> characters used in a string make R crash (i.e., Windows shows a dialogue saying
> that the application has a problem, and must
2013 Feb 08
3
Border width on symbols plotted with the lattice package
Dear list members,
I can't figure out how get 'xyplot' or 'dotplot' in the 'lattice'
package to respect the 'lwd' value for specifying the border with for
*symbols* (for lines it works fine). Example:
-----
# Base graphics works fine (gives a 'fat? circle)
plot(5, cex=10, pch=21, lwd=10)
# But 'xyplot' or 'dotplot' doesn't
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
2011 Jan 21
1
match function causing bad performance when using table function on factors with multibyte characters on Windows
[I originally posted this on the R-help mailing list, and it was suggested that R-devel would be a better
place to dicuss it.]
Running ?table? on a factor with levels containing non-ASCII characters
seems to result in extremely bad performance on Windows. Here?s a simple
example with benchmark results (I?ve reduced the number of replications to
make the function finish within reasonable time):
2009 Dec 15
1
Antwort: Re: R on Windows crashes when using certain (PR#14143)
The new version of R-devel from yesterday morning seems to have fixed bug=20
14114! Thanks a lot for your help.
Duncan Murdoch <murdoch at stats.uwo.ca> schrieb am 14.12.2009 13:34:35:
> On 10/12/2009 4:20 AM, karl at huftis.org wrote:
> > Full=5FName: Karl Ove Hufthammer
> > Version: 2.10.0
> > OS: Windows XP
> > Submission from: (NULL) (93.124.134.66)
>
2006 Sep 12
1
lattice cloud and conditional axis limits
I'm using the 'cloud' function in the 'lattice' package to produce
multi-panel 3D scatter plots. The range of the values used vary much
between each panel (especially on the z axis), so I wish the axis limits
to be calculated based on the (conditional) data.
Here's a minimal example:
library(lattice)
z=1:200
x=runif(200)
y=runif(200)
s=factor(rep(c(1,2),each=100))
2009 Oct 30
1
Applying a function on n nearest neighbours
I'm having a problem where I have to apply a function to a subset of a
variable, where the subset is defined by the n nearest neighbours of a
second variable.
Here's an example applied to the 'iris' dataset:
$ head(iris)
Sepal.Length Sepal.Width Petal.Length Petal.Width Species
1 5.1 3.5 1.4 0.2 setosa
2 4.9 3.0 1.4
2007 Nov 19
1
(PR#10437) segfault on functions with 'source' attribute
I am not sure why you would want to do that, but the C code does assume
source attributes were put there by R, and changing tests from !isNull to
isString in a few places will fix that.
If there is a character vector "source" attribute it should be used: that
is the point of such attributes.
On Mon, 19 Nov 2007, karl at huftis.org wrote:
> Full_Name: Karl Ove Hufthammer
>
2009 Dec 07
1
Subset of time observations where timediff > 60 secs
Dear list members
I have a rather large vector (part of a data frame) giving the time
(date + time, POSIXct) of observations. The times are irregular (with
both small and large jumps) but increasing, and there are several
millions of them.
I now wish to reduce my data set, so that I only have observations which
are at least (for example) 60 seconds apart. Basically, I need (all) the
indices
2011 Feb 02
3
Applying multiple functions to one object
Dear list members,
I recall seeing a convenience function for applying multiple functions to
one object (i.e., almost the opposite of 'mapply?) somewhere.
Example: If the function was named ?fun? the output of
fun(3.14, mode, typeof, class)
would be identical to the output of
c(mode(3.14), typeof(3.14), class(3.14))
Is my memory failing me, or does such a function already exists in a
2013 Jan 14
1
Tukey HSD plot with lines indicating (non-)significance
Dear list members,
I'm running some tests looking at differences between means for various
levels of a factor, using Tukey's HSD method.
I would like to plot the data as boxplots or dotplots, with horizontal
significance lines indicating which groups are statistically
significantly different, according to Tukey HSD. Here's a nice image
showing an example of such a graphical
2012 Aug 18
1
Parameter scaling problems with optim and Nelder-Mead method (bug?)
Dear all,
I?m having some problems getting optim with method="Nelder-Mead" to work
properly. It seems like there is no way of controlling the step size,
and the step size seems to depend on the *difference* between the
initial values, which makes no sense. Example:
f=function(xy, mu1, mu2) {
print(xy)
dnorm(xy[1]-mu1)*dnorm(xy[2]-mu2)
}
f1=function(xy) -f(xy, 0,
2009 Nov 25
0
Possible bug in "unsplit" (PR#14084)
Dear R-bug-people
I have encountered a problem with "unsplit", which I believe may be
caused by a bug in the function. However, unexpericend with bug-reports
I apologise if this is barely a user problem rather than a problem
within R.
The problem occurs if an object is split by several grouping factors
with levels not occuring in the data, and using drop = TRUE. This may
appear as
2007 Jul 13
1
Choosing the number of colour breaks in ggplot2
A seemingly simple problem has me stumped. Is it possible to choose the
number of colour breaks for a gradient scale in the current version of
ggplot2?
Here is a simple example:
---------------------------------------------
x=-10:10
y=-10:10
dat=expand.grid(x=x,y=y)
dat$z=dat$x^2+dat$y^2-100
ggplot(dat, mapping=aes(x=x, y=y, fill=z)) +
geom_tile() + scale_fill_gradient2()
2007 Jul 16
2
Different axis limits for each facet in ggplot2
Hi!
Is it possible to have different axis limit for each facet in a ggplot2
plot? Here is an example:
--------------------------------------------------------------
library(ggplot2)
x=seq(-10,10,.1)
y=cos(x)
z=sin(x)*10
dat=melt(data.frame(x,y,z), id.var="x")
qplot( x, value, data=dat, facets=variable~., geom="line" )
2008 May 30
1
Reducing space around lattice wireframe plots
Dear R-help.
When plotting 3D wireframe plots with the lattice package, there is often
a lot of space between the actual plot (i.e., cube) and panel borders. For
a single wireframe, this is not a problem, but when plotting multiple
wireframes, the wasted space decreases the size of the plots very much.
Is there a way to decrease this space/margin? I could not find any
information about it in
2008 Apr 15
1
Text-based graphics/plots
When discussing statistics in e-mail based discussion groups, or in
newsgroups, it is sometimes useful to include simple, text-based
statistical graphics. Here is an example, a histogram (only useful
with a fixed-width font, obviously).
:.....
..:::::::::.
.:::::::::::::::
2009 Jun 22
1
The gradient of a multivariate normal density with respect to its parameters
Does anybody know of a function that implements the derivative (gradient) of
the multivariate normal density with respect to the *parameters*?
It?s easy enough to implement myself, but I?d like to avoid reinventing the
wheel (with some bugs) if possible. Here?s a simple example of the result
I?d like, using numerical differentiation:
library(mvtnorm)
library(numDeriv)
f=function(pars, xx, yy)