Displaying 20 results from an estimated 100 matches similar to: "Importing many files"
2004 Nov 18
1
ROracle connection problem
Hi,
I found the same question in the mailing list already a few months ago -
but there was no answer to it - so I'll try it again
Could somebody help me to solve this following problem? I just begin to
learn how to connect my Oracle database with R.
> library(DBI)
> library(ROracle)
Warning message:
DLL attempted to change FPU control word from 8001f to 9001f
>
2009 Sep 17
0
geoR, variofit
Hello All!
I calculate a variogram using the function variog (package geoR)
afterwards I use variofit to fit a spherical model (see code below).
Now I just changed the units of the variable (in this case MPa to kPa
just a factor of 1000). If I do so, I get a different fit and
therefore different ranges etc. Why? The semi-variance is of course 6
orders of magnitude higher but the values
2010 Jan 14
2
paired repeated measurements
I have the following problem:
I measured co2 on 6 paired sites (one grubbed and one non-grubbed
fence per site -> grubbing = treatment). These measurements I repeated
15 times over 2 years. So, now my problem is how to analyze these
data. I tried the following model:
mod1_CO2<-lme(co2~treatment+time,random=~1|site,data=CO2_t1_t15)
I think with the random effect I included the paired
2005 May 07
3
converting NA/non-NA's to a binary variable
Dear R colleagues,
I am trying to create a new column in a data frame, which converts values
and NA's from another column into binary format. Essentially I need the
NA's to become 1 and the rest to be 0. The code I wrote is returning the
following error message:
Error in if (mort[i, 4] != NA) mort[i, 8] <- 0 else if (mort[i, 4] == :
missing value where TRUE/FALSE needed
2003 Oct 01
1
Text cutoff in legends
Dear r-help
If I display plots on the X11 device, the legends looks fine. But if
make an EPS, the longer entry in the legend is cutoff (and also in the
.pdf I do from the .eps)
Can you give me a hint and tell me what I do wrong, please ?
postscript("plot.eps",paper="special",horizontal=F,onefile=F,width=8.0,height=7.0)
dev.set (2)
dev.copy (which=3)
dev.off (3)
R Version
2011 Nov 16
0
calculating variograms (gstat) with large data sets
Dear all,
I am aiming to calculate variograms using variogram() from gstat.
The problem is that some of my data-sets are very large (> 400000 points).
Running the command takes some hours of time and does not give any
error-message.
Nevertheless the result seem not to be appropriate - the first few bins
are ok (up to a distance of about 300) but then it gains lags which are
much larger than
2003 May 07
4
element of
Dear all,
is there any funktion in R which i can use to check if a single value is element of a matrix or data.frame so that it returns me logical values like TRUE/FALSE.
Thanks in advance for your help!
2002 Jul 10
2
sorting matrices
how can i sort a matrix by sorting the first colloum in ascending order
and have the values of the other colloums in the relative position to
the sorted values.
thanks for help
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Send "info", "help", or
2008 Jun 15
2
round(1.5) = round(2.5) = 2?
Dear R-users
with a bit of grief I had to repeat an extensive analysis because I
did not suspect (and therefore did not read the documentation) that
round was implemented as "for rounding off a 5, the IEC 60559 standard
is expected to be used, 'go to the even digit'", resulting in
round(1.5) = 2
round (2.5) = 2.
As a non-mathematician I am both puzzled and intrigued by
2000 Dec 10
0
Patents on algorithms harm data analytic services
Cologne, 10.12.00
Dear Sir,
Dear Madam,
We are concerned about the possibility that the European Commission might introduce software patenting into the European Community because we think this will harm our profession.
We make our living on data management and statistical analyses. Modern statistics crucially depends on algorithms [cf. Venables, W. N., & Ripley, B. D. (1999). Modern applied
2001 Nov 22
0
winbindd, getent, primary group issue
Greetings all,
I am running winbindd running quite nicely on a suse 7.3 system.
(samba 2.2.2)
One issue (until now:-): I discovered that new created files
are created with the gid associated with the primary group of the particular user
which is fine and desired.
However: 'getent passwd' lists all users with the gid set to 10000 which
happens to be mapped to the 'Domain users'
2008 Jan 29
2
B-W stacked area chart with pattern
Dear all,
I would like to create a stacked area chart to show the development of
species biomass over time. Since it is intended for publication I need
to prepare in black and white. I have tried to modify the "stackedPlot"
function submitted to this list by Christian Lasarczyk on Tue, 16 Aug
2005 using shading lines rather than colors to distinguish between the
species.
2004 Jun 18
2
Barplots and error indicators: Some R-Code
I' ve seen that several people are looking for a function that creates a
barplot with an error indicators (I was one of them myself). Maybe you will
find the following code helpful (There are some examples how to use it at
the end):
# Creates a barplot.
#bar.plot() needs a datavector for the height of bars and a error
#indicator for the interval
#many of the usual R parameters can be set:
2000 Nov 17
2
Simulation of Timeseries
Hello,
I try to simulate an ARMA-model using R, but I didn't find any function
to generate such timeseries.
In Splus there is the function arima.sim which generates AR-, MA- and
ARIMA-series. Is there any similar in R?
Best regards,
Frank Beimfohr
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2002 Jun 24
1
barplot
Hi,
a couple of simple graphics questions:
1. I have a little function that makes bar plots. Now I would like to
limit the Y-axis outside this
function (that means after calling the barplot() command) depending on
the data to be plotted .
Does anyone know how to do this ???
2. When using barplot() and limiting the yAxis, R draws the bars below
the x-axis. How can I avoid this problem ??
2008 Feb 22
1
addtable2plot(plotrix)
Dear List
adding a table to a plot using addtable2plot(plotrix) does not seem to
work when using a logarithmic axis. The table is then reduced to one
line. Is there an argument to indicate that a log-scale is used, or an
alternative to add a bunch of information to a plot?
I'm using R 2.6.1 on WinXP SP2.
thanks
Markus
--
Markus Didion
Wald?kologie Forest Ecology
Inst. f.
2006 Mar 14
0
Test of Significance for overall-accuracy
Hello,
I have two classifications. How can I compare the overall-accuracy of these
classifications to each other?
Is there a possibility within R to test if the achieved overall-accuracy
for the classifications are differing significantly?
Additionaly, are the McNemar-Test and Broker-Test implented in a package of R?
Thank in advance for your help,
Markus
2005 Jun 28
0
index of dispersion
Hi list
I'm looking for statisitic measurements describing the pattern of points
within a given polygon. Is there a function calculating the Index of
Dispersion and/or are there other functions summarising an observed pattern?
Markus Schwarz
.....................................................................
Markus Schwarz
Wissenschaftliche Mitarbeiterin
Eidg. Forschungsanstalt WSL
2005 Aug 05
1
kappa-accuracy and test for signifcance
Dear list,
I calculated the kappa-accuracy for two differnt classifications.
How can I test now the two kappa-value for significance?
thanks, Mark
.....................................................................
Markus Schwarz
Wissenschaftliche Mitarbeiterin
Eidg. Forschungsanstalt WSL
Forschungsprogramm Musterland
Z??rcherstrasse 111
CH-8903 Birmensdorf
Telefon +41-44-739 22 87
Fax
2002 Jul 16
2
selectively aggregate data
I'm shure that this kind of question is asked not for the fist time, but
i would be glad if someone of you could help me out
I have a data.frame like this :
subjnr group block data
1 33 1 1 564.476
2 33 1 1 289.185
3 33 1 1 483.372
4 33 1 1 1461.260
5 33 1 1 315.353
6 33 1 1 351.870
7 33