Displaying 20 results from an estimated 7000 matches similar to: "axes that meet"
2007 May 31
2
Different fonts on different axes
Hi Folks,
How do I get red bold font on my y axis and black standard font on my
x axis?
plot(runif(10), ylab="Red, Bold?", xlab="Black, standard?")
Any pointers or examples would be great.
Thanks!
Hank
Dr. Hank Stevens, Assistant Professor
338 Pearson Hall
Botany Department
Miami University
Oxford, OH 45056
Office: (513) 529-4206
Lab: (513) 529-4262
FAX: (513) 529-4243
2005 Jul 01
2
Simple indexing conundrum
My apologies in advance for my thickness but I can't seem to solve the
following, seemingly simple, data manipulation problem:
I have a data frame that contains multiple factors and multiple
continuous response variables, but duplicates of some factor
combinations. The duplicates contain bad data, so I would like to
eliminate the duplicates. I would like to retain the entire rows
2005 Oct 26
2
changing memory limits to speed up lsoda
Hi All,
I am running R 2.2.0 on Mac OS 10.4.2, dual G5 processors with 8 Gig
RAM.
I am running a simulation with lsoda that requires ~378 s to complete
one set of time intervals. I need to optimize the parameters, and so
need to considerably speed up the simulation.
I have tried to figure out how to change the appropriate memory
allocation and have search R help and Introductory
2005 Jul 27
4
odesolve/lsoda differences on Windows and Mac
Hi -
I am getting different results when I run the numerical integrator
function lsoda (odesolve package) on a Mac and a PC. I am trying to
simulating a system of 10 ODE's with two exogenous pulsed inputs to the
system, and have had reasonably good success with many model parameter
sets. Under some parameter sets, however, the simulations fail on the
Mac (see error message below). The
2004 Feb 09
3
citing a package?
How do I cite a package (not R itself - I know how to do that)? Any
thoughts or links?
Many thanks in advance?
Hank Stevens
Dr. Martin Henry H. Stevens, Assistant Professor
338 Pearson Hall
Botany Department
Miami University
Oxford, OH 45056
Office: (513) 529-4206
Lab: (513) 529-4262
FAX: (513) 529-4243
http://www.cas.muohio.edu/botany/bot/henry.html
http://www.muohio.edu/ecology/
2006 Jun 14
3
appending
All,
In the function below I have 24 individuals and 6 calculations per
individual.
The 6 calculations are collected each time in a 1:24 loop when
calculating "delta".
I'd like to collect all 144 = 24*6 calculations in one vector
("delta.patient.comb").
The function works as is via indexing, but is there an easier way to
collect the measurements via appendinng the 6
2003 Apr 29
1
plot with nlme
Using R v. 1.7.0 on Windows 2000
I would like to plot the fitted values of a model as a function of a
continuous covariate, augmented with data (e.g., augPred) grouping by
combinations of fixed effects. I have not been able to use augPred
effectively, and am wondering if it does not handle unbalanced data (3 out
of 192 missing).
I include below the model and an xyplot that almost does the
2003 Nov 17
2
Symbolic math?
Hi Folks,
I am using Windows 2000 and was wondering what (Open Source) software R
users use or might recommend for symbolic computations (aside from the ol'
noggin, e.g., Maxima, Mathomatic) .
Thanks,
Hank
Dr. Martin Henry H. Stevens, Assistant Professor
338 Pearson Hall
Botany Department
Miami University
Oxford, OH 45056
Office: (513) 529-4206
Lab: (513) 529-4262
FAX: (513) 529-4243
2007 Aug 13
2
Error message when using zero-inflated count regression model in package zicounts
I have data on number of vines per tree for ~550 trees. Over half of
the trees did not have any vines and the data is fairly skewed
(median = 0, mean = 1.158, 3rd qu. = 1.000). I am attempting to
investigate whether plot location (four sites), species (I'm using
only the four most common species), or tree dbh has a significant
influence on the number of vines per tree. When I
2007 Jun 11
1
Package update announcements
Hi Folks,
I was wondering what everyone thought about adding a sentence to each
package update announcement that described what the package did. R
extensions are so numerous that it is difficult to keep up with them.
Would it be appropriate to ask package developers to add a brief
sentence about what the package does, when they announce updates?
I would benefit from such descriptions.
2008 Aug 12
1
tilde on a spanish keyboard?
I was trying to help someone who used a spanish keyboard on a PC
running Windows. he discovered that he had no tilde key. Does anyone
know of any simple work-arounds?
Thanks,
Hank
Dr. Hank Stevens, Associate Professor
338 Pearson Hall
Botany Department
Miami University
Oxford, OH 45056
Office: (513) 529-4206
Lab: (513) 529-4262
FAX: (513) 529-4243
http://www.cas.muohio.edu/~stevenmh/
2006 Feb 16
2
Help to find correlation.
Respected Sir,
I am trying to import excel file into R, but I need to truncate some columns from the original file.
How to delete unwanted columns when I import data from excel file.
How to use cor.test for the data when I want the output rowwise.
How to do grouping and use cor.test on that data
I need some help regarding how to calculate the correlation.
I don't know whether you
2004 May 06
3
IE5 and the html help function
I recently formatted and reinstalled my laptop. Since then html-help
function is not working properly.
I can open the page, however, searching for any term or opening any link
does not work.
The Internet explorer just mentions an error on the page if I try to open a
links and instead of searching it reloads the page.
Reinstalling R did not help and now I am not sure if it is the IE, or R, or
2002 Jun 21
1
lme: anova vs. intervals
Windows 2000 (v.5.00.2195), R 1.5.1
I have an lme object, fm0, which I examine with anova() and intervals().
The anova output indicates one of the interaction terms is significant, but
the intervals output shows that the single parameter for that term includes
0.0 in its 95% CI. I believe that the anova is a conditional (sequential)
test; is intervals marginal or approximate? Which should I
2004 Sep 16
1
geoR/variog4() not returning all directions
Mac OS 10.3.5, R 2.0.0
latest version of geoR
I have an incomplete 5 x 20 spatial array of samples (60 out of 100
possible locations) for which I would like to calculate directional
variograms using variog4(). Unfortunately, I can't get it to return all
4 directions. It returns variograms for 45, 90, and 135 degrees,
omitting 0 degrees (pi/4, pi/2, 3pi/4, omitting 0). If I specify 0
2006 Jun 09
1
binomial lmer and fixed effects
Hi Folks,
I think I have searched exhaustively, including, of course R-help (D.
Bates, S. Graves, and others) and but I remain uncertain about
testing fixed effects with lmer(..., family=binomial).
I gather that mcmcsamp does not work with Do we rely exclusively on z
values of model parameters, or could we use anova() with likelihood
ratios, AIC and BIC, with (or without)
2006 Dec 11
2
How to write a two-way interaction as a random effect in a lmer model?
Dear All,
I am working with linear mixed-effects models using the lme4 package in
R. I created a model with the lmer function including some main effects,
a two-way interaction and a random effect. Now I am searching how I
could incorporate an interaction between the random effect and one of
the fixed effects.
I tried to express the interaction in:
2004 Sep 23
3
R glm
Hello:
would you please help me with the following glm question?
for the R function glm, what I understand is: once you specify the
"family", then the link function is fixed.
My question is: is it possible I use, for example, "log" link function,
but the estimation approach for the guassian family?
Thanks,
Shuangge Ma, Ph.D.
********************************************
*
2005 Oct 10
3
Under-dispersion - a stats question?
Hello all:
I frequently have glm models in which the residual variance is much
lower than the residual degrees of freedom (e.g. Res.Dev=30.5, Res.DF
= 82). Is it appropriate for me to use a quasipoisson error
distribution and test it with an F distribution? It seems to me that
I could stand to gain a much-reduced standard error if I let the
procedure estimate my dispersion factor (which
2007 Jul 25
1
Is Rwiki down?
Dear R-friends,
is Rwiki down? I've been trying to login for the past
couple of days with no success.
Yours sincerely,
Jin
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