Displaying 20 results from an estimated 119 matches for "hufthamm".
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hufthammer
2009 Nov 13
4
processing log file
Dear all, I'm trying to process a log file which logs the date, the username and the computer number accessed. The table looks like this:
>table.users
Date UserName Machine
1 2008-11-25 John 641
2 2008-11-25 Clive 611
3 2008-11-25 Jeremy 641
4 2008-11-25 Walt 722
5 2008-11-25 Tony 645
6 2008-11-26 Tony 645
7 2008-11-26
2013 Feb 08
3
Border width on symbols plotted with the lattice package
...auto.key=TRUE)
-----
For 'xyplot' or 'dotplot' the border stays thin no matter what I set
'lwd' to. However, the symbols shown in the *legend* has the 'lwd'
correctly applied.
How can I fix this? Or is it simply a bug in the 'lattice' package?
Karl Ove Hufthammer
Output of 'sessionInfo()':
R version 2.15.2 (2012-10-26)
Platform: x86_64-w64-mingw32/x64 (64-bit)
locale:
[1] LC_COLLATE=Norwegian-Nynorsk_Norway.1252
[2] LC_CTYPE=Norwegian-Nynorsk_Norway.1252
[3] LC_MONETARY=Norwegian-Nynorsk_Norway.1252
[4] LC_NUMERIC=C
[5] LC_TIME=Norwegian-Nyno...
2007 Jul 13
1
Choosing the number of colour breaks in ggplot2
...z=dat$x^2+dat$y^2-100
ggplot(dat, mapping=aes(x=x, y=y, fill=z)) +
geom_tile() + scale_fill_gradient2()
---------------------------------------------
The image shows many (61) colours, but only 5 of them are shown in the
legend. How do I change the legend to show, say, 10 colours?
--
Karl Ove Hufthammer
2008 Apr 22
2
Getting rid of borders on semi-transparent plotting symbols
...e border
colour) is the one I want?
Frankly, the current behaviour feels much more like a bug than a feature.
If I set pch=19, I want a completely filled circle, even if my chosen
colour is partially transparent.
I'm using
R version 2.7.0 RC (2008-04-20 r45403)
i686-pc-linux-gnu
--
Karl Ove Hufthammer
2009 Oct 19
2
Possible bug in plot.POSIXct regarding x axis
...lower left corner, which makes no sense.
Compare this to a simple 'plot(x)', which shows the index numbers on the
x axis.
I observe this with both R 2.9.2 and 2.10.0 alphas.
If anybody can confirm that this should be considered a bug, I'll report
it in the bug system.
--
Karl Ove Hufthammer
2011 Feb 02
3
Applying multiple functions to one object
...ion that could also handle vectors and
lists of values, and output the result as data frames or matrices. Example:
x = c("foo", "bar", "foobar")
fun(x, nchar, function(st) substr(st, 1 ,2) )
y = list(3, 3L, 3.14, factor(3))
fun(x, mode, typeof, class)
--
Karl Ove Hufthammer
2009 Mar 20
2
Accuracy of R and other platforms
Hi,
The paper
@ARTICLE{AlmironSilvaMM:2009,
author = {Almiron, M. and Almeida, E. S. and Miranda, M.},
title = {The Reliability of Statistical Functions in Four Software Packages
Freely used in Numerical Computation},
journal = {Brazilian Journal of Probability and Statistics},
year = {in press},
volume = {Special Issue on Statistical Image and Signal Processing},
url =
2009 Oct 05
2
Long for Loop- calling C from R - Parallel Computing
Hello everyone,
I'm running the following for loop to generate random variables in chunks of
60 at a time (l), here h is of order in millions (could be 5 to 6 millions),
note that generating all the variables at once could have an impact on the
final results
for(j in 1:h){
dat$t.o[seq(0,g1,l)[j]+1:l]<-dat$mu[seq(0,g1,l)[j]+1:l] +
rnorm(l,0,dat$g.var[seq(0,g1,l)[j]+1:l])
}
Is there any
2007 Jul 16
2
Different axis limits for each facet in ggplot2
...ble to do this in 'ggplot2' too? I would have thought that
+ scale_y_continuous(limits=c(NA,NA))
would work, but this sets the 'y' axis to cover the range of 'y' and 'z'
*combined* (which is very sensible as a default, but not what I would
prefer here).
--
Karl Ove Hufthammer
2008 May 30
1
Reducing space around lattice wireframe plots
...))
xy1 = con2tr(kde2d(x1, y1, n = 30, lims = ran))
xy1$dist = "correlated"
xy2 = con2tr(kde2d(x2, y2, n = 30, lims = ran))
xy2$dist = "uncorrelated"
xy = rbind(xy1, xy2)
wireframe(z ~ x * y | dist, xy, screen = list(z = 16, y = -5, x = -47))
--
Karl Ove Hufthammer
2009 Oct 30
1
Applying a function on n nearest neighbours
...value equal to 1. (Exactly how to break ties when there are more than n
number of observations with the same distance to the original row isn't
very important, though. For example, using the ones with lowest row
numbers would be an OK solution, or n random ones, would both OK.)
--
Karl Ove Hufthammer
2009 Oct 30
2
data.frame extracting data row-wise
Dear All,
I am struggling with extracting data from a data frame:
x=data.frame(a=1:11,b=100:110)
What I want is a list/vector in this sence: 1 100 2 101 3 102...
For single rows, this works fine:
as.matrix(x)[1,]
For, say 2 rows, this works fine:
z=c(as.matrix(x)[1,],as.matrix(x)[2,])
But
z=c(as.matrix(x)[1:2,])
gives 1 2 100 101!?
Is there an 'automated way' to produce a
2009 Nov 25
1
Kerning issues with CairoPDF
...UMERIC=C
[5] LC_TIME=Norwegian-Nynorsk_Norway.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] Cairo_1.4-5
loaded via a namespace (and not attached):
[1] tools_2.10.0
--
Karl Ove Hufthammer
2006 Sep 12
1
lattice cloud and conditional axis limits
...ed the same way the
'xypanel' function does, one of the following would work:
cloud(z~x*y|s,scales=list(arrows=FALSE,z=list(relation="free")))
cloud(z~x*y|s,scales=list(arrows=FALSE,relation="free"))
However, it does not. Any ideas how I can make it work?
--
Karl Ove Hufthammer
E-mail and Jabber: karl at huftis.org
2008 Apr 15
1
Text-based graphics/plots
...39; function, which is very nicely
implemented, BTW. Here is some sample output (normal distribution,
with decimal point at '|').
46 | 8
47 | 123799
48 | 01222234456
49 | 001222333444678
50 | 1233334457788
51 | 00022556667778999
52 | 0112223
53 | 79
54 | 049
--
Karl Ove Hufthammer
2009 Dec 07
1
Subset of time observations where timediff > 60 secs
...erval following the first time value, and thus may include
times with values that are closer than 60 seconds.
I also considered round.POSIXct and trunc.POSIXct, but these are not
appropriate either, for obvious reasons.
So, any ideas how to do this in an elegant and efficient way?
--
Karl Ove Hufthammer
2009 Jun 22
1
The gradient of a multivariate normal density with respect to its parameters
...pars[5]
sig=matrix(c(sig1^2,rho*sig1*sig2,rho*sig1*sig2,sig2^2),2)
dmvnorm(cbind(x,y),mu,sig)
}
mu1=1
mu2=2
sig1=3
sig2=4
rho=.5
x=2 # or a x vector
y=3 # or a y vector
jacobian(f,c(mu1,mu2,sig1,sig2,rho),xx=x,yy=y)
# (Can replace ?jacobian? with ?grad? if x and y have length 1.)
--
Karl Ove Hufthammer
2004 Mar 23
2
Tool for cutting Ogg Vorbis files
.... Cutting an Ogg file without adapting
anything here and there will produce broken files. I
could not find any understandable documentation of a
structure in Vorbis files. If you know such docs, please
let me know.
Does anybody here know of such docs?
--
Karl Ove Hufthammer
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2009 Nov 23
1
Natural colours for topographic data
...to 0 meters, and 20
colours of land, from a depth of 0 meters to 2000 meters), support
several nice palettes, and also support logarithmic colour mapping. But
I would be happy with a simple one, that just mapped negative values to
water colours and positive values to land colours.
--
Karl Ove Hufthammer
2009 Dec 10
3
How to figure out which the version of split is used?
There are a number of functions that are dispatched to from split().
> methods('split')
[1] split.data.frame split.Date split.default split.POSIXct
Is there a way to figure out which of these variants is actually
dispatched to when I call split? I know that if the argument is of the
type data.frame, split.data.frame will be called? Is it the case that
if the argument is not