Displaying 20 results from an estimated 1000 matches similar to: "strsplit with dataframes"
2005 Dec 02
2
Seven month time-series sampled at hourly intervals
I have data from several sensors that recorded data at hourly intervals
during seven months. I want to separate daily variation from the trend,
and also be able to zoom in on only one month of data.
I have not been able what functions to use, I can not figure out from
the help for 'ts' how to use hourly data.
I guess this is routine-work for a lot of people so I hope someone can
2004 Nov 23
2
Create a vector of combinations based on a table column names
I want to create a character vector based on the table (shortened for
display) below:
Where there are ones in the matrix I want the column name to appear and
where there are zeros nothing, which would make the vector in this
shortened case:
combinations <- ("A B","A C","A E H","A F G","B C D","E G H",A C D E
H","A C D F
2004 Mar 02
1
R programming
I have been using R for a few months to plot my data, and fit
statistical models and so on.
It is stated that R is not only a package for statistcs and graphics but
also a programming language.
Currently I am working with Fortran 90 to do numerical simulations (1D
reactive -transport), and subsequently visualize it in some external
software (spreadsheet). As I now started using R I will plot my
2004 May 18
7
Isotopic notation in plots
I really like to use R for all my graphs, and as I work with stable
isotopes I want to have a proper chemical notation in my plots
I have looked at ?plotmath, but didn't find the answer and also searched
the R website.
------------------------------------------------------------------------
--
plot(1:10,xlab=expression(^{14}*C)) # I want to have a superscript with
nothing in front, but it
2005 Jul 26
5
Plot zooming i.e. changing ylim according to xlim
Dear R-gurus,
I would like to zoom in a plot, e.g. I select a region on the x-axis and
then I would like the ranges on the y-axis to change accordingly.
Is it possible to do this with existing functions, or do I have to
invent some data selection before plotting?
See below a short example, where I select ylim with trial and error,
which I want to avoid.
Cheers, Henrik Andersson
2004 Dec 06
4
Modyfing PATH in Windows Installer for R
Just a small suggestion since Windows have a file system not designed
for command line use...
Would it be possible to add the possibility of automatically
adding/modifying the path to the R executables in the windows installer
program?
---------------------------------------------
Henrik Andersson
Netherlands Institute of Ecology -
Centre for Estuarine and Marine Ecology
P.O. Box 140
4400 AC
2010 Jan 07
1
faster GLS code
Dear helpers,
I wrote a code which estimates a multi-equation model with generalized
least squares (GLS). I can use GLS because I know the covariance matrix of
the residuals a priori. However, it is a bit slow and I wonder if anybody
would be able to point out a way to make it faster (it is part of a bigger
code and needs to run several times).
Any suggestion would be greatly appreciated.
Carlo
2004 Oct 07
1
confidence interval for nls
Do I have the right impression that it's currently not possible to
produce confidence intervals for the nls predictions using R?
I had a course were we used SAS PROC nlin and there you could get
intervals for the parameters and the prediction but I do not have access
to SAS.
Would it be difficult to implement, I tried to dig into the help pages
of nls, vcov and nlsModel but I could not
2005 Feb 04
1
Output from function to a tcltk window
I would like to display output to a tcltk window from e.g. a call to
summary().
I tried to get something else than oneliners into a text window of the
kind found at:
http://bioinf.wehi.edu.au/~wettenhall/RTclTkExamples/TextWindows.html
But without success.
Henrik
-------------------------------------------------------------
Henrik Andersson
Netherlands Institute of Ecology -
Centre for
2004 Aug 30
1
axes=F with pairs()
If I want to fiddle with the axes, I normally plot things like this for
instance
plot(1:5,axes=F)
axis(2,labels=letters[1:5])
BUT, if I want to do remove the axes from a scatter plot matrix using i.e.
pairs(cbind(runif(10),runif(10)),axes=F)
I get
Error in plot.default(x[, j], x[, i], xlab = "", ylab = "", axes =
FALSE, :
formal argument "axes" matched by
2004 Oct 21
1
Arrow heads at the end of axes
I would like to have arrow heads at the end of my axes, since I am
plotting variable where the absolute amount is irrelevant, there is not
supposed to be numbers on the axes.
An imperfect example:
plot(rnorm(10),bty='l',xaxt='n',yaxt='n',ylab='',xlab='',type='l')
abline(h=0)
Like this but without, the xaxis and with arrrowheads
More like this in
2005 Jan 13
1
Setting the width and height of a Sweave figure
Hello R-people,
I have a function which plots two figures next to each other
using if(dev.cur()==1) x11(width=14,height=7) to create a new window
and set the size of the window automatically if no device is open.
This works fine in interactive mode but I don't know how Sweave gets the
parameters for the figures, and right now the default behavior causes
this figure to be square and the
2005 May 30
1
Formatting numbers with a limited amount of digits consistently
I have tried to get signif, round and format to display numbers like
these consistently in a table, using e.g. signif(x,digits=3)
17.01
18.15
I want
17.0
18.2
Not
17
18.2
Why is the last digit stripped off in the case when it is zero!
Is this a "feature" of R or did I miss something?
---------------------------------------------
Henrik Andersson
Netherlands Institute of
2005 Sep 14
1
Long lines with Sweave
I have used Sweave a lot the latest year, but never really used any long
function calls.
If I have code which look like this
-------------------------------------------------------------
gof <- benthic.flux(ID="Gulf of Finland",
meas.conc=conc,
bw.conc=bw.conc,
time=times,
2004 Nov 23
0
Create a vector of combinations based on a table column n ames
Here's another way:
> dat <- read.table("clipboard", header=TRUE)[,-(1:3)]
> dat
A B C D E F G H
1 1 1 0 0 0 0 0 0
2 1 0 1 0 0 0 0 0
3 1 0 0 0 1 0 0 1
4 1 0 0 0 0 1 1 0
5 0 1 1 1 0 0 0 0
6 0 0 1 0 1 0 1 1
7 0 0 0 1 1 1 0 1
8 1 0 1 1 1 0 0 1
9 1 0 1 1 0 1 1 0
> apply(dat > 0, 1, function(idx) paste(names(dat)[idx], collapse=" "))
1 2
2004 Oct 25
2
Reading sections of data files based on pattern matching
I am about to write general functions to read the output of simulations
models.
These model generate output files with different sections which I want
to analyze plot etc.
Since this will be used many people at the department I wanted to make
sure that will do this in the best way.
For instance I want to read a snippets of data from a text that look
like this.
2008 Feb 13
2
Newbie HLM with lme4 questions
Dear R listers,
I know I'm breaking the rules by asking a "homework" related question--
I hope you'll forgive me. I am a social psychology graduate student,
and the only one in my department who uses R. I successfully completed
my multiple regression and structural equation modeling courses using
R (John Fox's car and sem packages were a big help, as was his book).
2012 Aug 04
1
lme4 / HLM question
I'm hoping that this is a relatively easy question for someone familiar with
the lme4 package.
I'm accustomed to using HLM software and writing a simple 2 level [null]
equation like this:
L1 - Yij = b0 + e
L2 - b0 = B00 + u0
The following command in R provides results that are identical to the HLM
program.
results <- lmer( Y ~ 1 |id , PanelData4)
I can't
2009 Jul 16
0
how to get means and confidence limits after glmmPQL or lmer
R,
I want to get means and confidence limits on the original scale for
the treatment effect after running a mixed model.
The data are:
response<-c(16,4,5,8,41,45,10,15,11,3,1,64,41,23,18,16,10,22,2,3)
2004 Aug 09
0
Need help on this problem!
Hi everyone,
I have posted a similar question to this list, but I don't
get a reply. I really want to solve this problem, so I
post it again...
I am trying to use R to fit some mixed-effects models for
a nested data. The data is a simulated data with 111
subjects. Each subject has 6 waves' data. Below are the
first two subjects' data :
> simu1[1:12,]
Grouped Data: gf ~ age |