Displaying 20 results from an estimated 20000 matches similar to: "Combining expressions."
2004 Mar 22
5
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2010 May 06
2
Problem with install.packages(); getting out-of-date version.
I recently tried to install the latest version of spatstat, from CRAN,
using the install.packages() function. It proceeded to install version
1.17-5 of spatstat, although the current version is 1.18-4.
Checking the CRAN mirror that I used (New Zealand) via Firefox, I found
that version 1.18-4 is indeed present on CRAN. I was able to download
and install version 1.18-4 ``manually''
2007 May 21
3
quartz() on MAC OSX
I am (desperately) trying to get used to using a Mac here at my new
location. (Why *anyone* would ever use anything other than Linux, except
under duress as I am, totally escapes me, but that's another story.)
Fortunately much of the Mac OSX is actually Unix, so a civilized person can
manage to carry on ... But there are some things. (Like this <expletive
deleted> mailer ... But
2009 Oct 29
4
deriv() to take vector of expressions as 1st arg?
The deriv() function takes an 'expression' as its first argument). I was
wondering if the this function can take an array or a vector of
expressions as its first argument. Aside, I saw how to give a vector
argument to the second argument.
like to have something like:
deriv(c(~x^2+y^3, ~x^5+y^6), c("x","y"))
the documentation for this function talks about being able to
2002 Mar 19
1
Catenating expressions in plotmath().
I want to do something like produce a plot title of the form
``Sample size n = 42; critical value k_0 = 17.''
where the ``n'' is to be in a maths font and ``k_0'' indicates
that the 0 is a subscript. (A la LaTeX.)
But the values ``42'' and ``17'' are to be substituted in from the
numeric values of R objects.
After a bit of struggle I found that
>
2009 Dec 02
0
[Fwd: Re: Adding and Multiplying two Unevaluated Expressions]
-------- Original-Nachricht --------
Betreff: Re: [R] Adding and Multiplying two Unevaluated Expressions
Datum: Tue, 01 Dec 2009 23:49:39 +0100
Von: Benjamin M?ller <ben_mueller.bm at web.de>
An: Rolf Turner <r.turner at auckland.ac.nz>
Referenzen: <20091201144125.316310 at gmx.net>
<8E40E49F-E8FC-4FBD-8CC5-93789FFB0E53 at auckland.ac.nz>
This works fine for your
2010 Sep 16
8
function help?
Hi all,
I am writing a function (fun.R), but I dont know how to code the
function so that the Help Text will be shown up when one types ?fun (of
course, after he loads it up). Anyone has any advice for me how to do that?
Thanks,
D.
2000 Aug 31
3
help with data import/export
how can I import/export data from ms excel?
also is there a way to import/export data of the hdf format?
is there a way to import/export hdf format for ms excel as well?
thank you very much in advance.
/js
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2008 Jul 02
1
Constructing logical expressions dynamically
Hello,
I am trying to construct a logical expression dynamically, for use in the
subset() function. I am puzzled by problems with the code that follows
below.
Probably there's an easier way to select rows of a data frame according to
some dynamic criteria--and I'd love to hear about it--but I'd also like to
understand what I'm doing incorrectly in constructing the expression in
2009 Mar 19
2
How to set R_PROFILE conditional on batch or interactive mode
I am running R 2.8.1 on SUSE Linux. I would like to be able to set
R_PROFILE to two different possibilities. One when R is called by R CMD
BATCH and another any other time. Is this possible?
Mark Lyman, Statistician
Engineering Systems & Integration, ATK
2003 Dec 29
2
Outlook 2002 sp-2 and initial connection after OS reboot
I have a strange problem that I have been experienceing with dovecot:
Dovecot version : 0.99.10.4-1 Using IMAP:
When I restart the OS (windows XP) and open up Outlook 2002 SP2 I
don't automatically get my IMAP folders on the DOVECOT imap server.
(the one on the uw_imap server open up straight away)
When I click on inbox I cam given a message saying : unable to connect
to imap folders
2010 Mar 08
2
variance of discrete uniform distribution
Hi all,
I am REALLY confused with the variance right now.
for a discrete uniform distribution on [1,12]
the mean is (1+12)/2=6.5
which is ok.
y=1:12
mean(y)
then var(y)
gives me 13
1- on http://en.wikipedia.org/wiki/Uniform_distribution_%28discrete%29 wiki
the variance is (12^2-1)/12=143/12
2-
2009 Nov 18
3
Re ading multiple Excel 2007 files with a loop
I have several hundred Excel 2007 data files in a folder. I would like to
read every file in a single given folder using a loop.
I have searched the FAQ, the forum archives here, other or older R boards
and the R Import / Export documentation, and have asked some very
knowledgeable R users without learning of a solution. I hope someone here
can help.
I understand that the most common
2010 Jan 18
1
how to install spatstat
Hi,
I tried to install spatstat using:
install.packages("spatstat", dependencies = TRUE, lib =
"./R/i486-pc-linux-gnu-library/2.8")
but got the following msg:
--- Please select a CRAN mirror for use in this session ---
<here i selected one mirror, and tried several mirrors)
Loading Tcl/Tk interface ... done
Warning message:
In install.packages("spatstat",
2010 Jan 30
1
MA parameter in R vs. Minitab
Dear R People:
I ran an ARIMA(1,0,1) on a particular series in R and got a negative
MA(1) estimate.
Then I ran an ARIMA(1,0,1) on the same series in Minitab and got a
positive MA(1) estimate.
The values are about -0.69 and 0.70.
Does R show the opposite value, please?
Thanks,
Erin
--
Erin Hodgess
Associate Professor
Department of Computer and Mathematical Sciences
University of Houston -
2008 Oct 07
2
fitting a curve to data points
Hello all. This is likely to be a silly question, but I have a set of
data points and I want to fit a curve to it, like this:
http://www.igc.usp.br/pessoais/guano/temp/curve.png.
which function should I use?
many thanks
Carlos
--
+-----------------------------------------------------------+
Carlos Henrique Grohmann - Guano
Geologist M.Sc - Doctorate Student at IGc-USP -
2008 Dec 17
1
append lines to a created file
hi,
I try to append a line to a file with;
writeLines("xxx", con = "file.txt, sep = "\n")
but it always overwrites the existing content.
How can I "change" the "mode" of writeLines to append ("a") ?
2009 May 13
2
(no subject)
Dear R users,
Does anyone know how to graph the function below?
sqrt(2)Γ(n/2)/[sqrt(n − 1)Γ((n − 1)/2]
Please help.
Debbie
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2009 May 24
1
about strauss process
i have trouble in using spatstat package.
i want to simulate a community under the Strauss process,which has a parameter gamma that controls interaction strength between points,and Strauss process is defined only for 0 ¡Ügamma ¡Ü 1 and is a model for inhibition between points.
my problem is that in my data, many species's estimated gamma is larger than one.so if i still wanna simulate
2009 Nov 01
1
problems whit seasonal ARIMA
Hello,
I have daily wind speed data and need to fit seasonal ARIMA model, problem
is that my period is 365. But when I use arima(...) function, with period
365, I?m getting error message: ?Error in makeARIMA(trarma[[1]],
trarma[[2]], Delta, kappa) : maximum supported lag is 350?. Can someone
help me with this problem?
Thank you
Sincerely yours,
Laura Saltyte