Displaying 20 results from an estimated 140 matches similar to: "Multilevel modeling of animal behavior"
2003 Oct 16
2
Interpolation of azimuth values
Hello
I will make an interpolation of data which represents azimuth direction
( angle from north in clockwise direction) values.
But there is a problem.
Say, for instance, while 1 and 359 indicate somewhat same direction,
interpolation puts values
in the range from 1 to 359. What can I do to solve the problem ?
Anything you offer ?
thanks in advance
Ahmet Temiz
General Directory of
2012 Dec 31
2
code to convert 3D geographical coordinates to Cartesian?
Is there packaged code to convert geographical coordinates (e.g.,
longitude, latitude, elevation) to Cartesian coordinates in 3-space?
I can see how to do this using
1. a spherical-to-Cartesian conversion like pracma::sph2cart(tpr)
http://cran.r-project.org/web/packages/pracma/
2. a geographical-to-spherical conversion. This seems to involve (in
roughly increasing order of difficulty or
2008 Sep 29
1
Ambisonics Proposal summary.
Hi all,
My apologies for the confusion ... but I am re-naming this thread
again because the proposal doesn't come from Ambisonia. As the founder
of Ambisonia I have only been 'mediating' between some members of the
ambisonic community ... so it would be wrong to associate the spec
with Ambisonia.
To clarify. This is what the spec proposes:
- that Mapping = 1 means the contents are
2009 Sep 03
1
Output from as.windrose() in oce package baffles me
I'm having trouble understanding the output from as.windrose(). For one
thing, data on a boundary between sectors seem to be left out of the
counts. I assume that explains the missing point in the output below
(angle 45). Shouldn't one side of each sector interval be open, to
include values such as my 45 in the example? Also, why does the angle
180 in my input apparently not result in
2008 Jun 04
1
ggplot questions
Hello,
A few questions about the following examples:
1. Why do the two plotting versions not produce the same result?
2. Is the 'scale_x_continuous' (or *_y_* or *_*_discrete) geom the best
way to setup grids (as in visual guide-lines) in polar (or for that
matter, any) coordinate system?
3. Why do these commands appear to generate 3 plot pages each?
4. Perhaps more questions to follow
2010 Nov 19
2
Calculating distance between longitude,latitude of 2 points
Hi all,
I would like to know a way of calculating the distance between 2 points when
I already have the longitude and latitude of the points.
For example :
Point 1 : 52? 9'54.00"N 4?25'8.40"E
Point 2 : 52?27'46.80"N 4?33'18.00"E
Distance between point 1 and point in km ....
Is there any functions already available for this ?
Any help will be much
1999 Jul 08
1
Bad Units Bug in barplot with pictex output device. (PR#220)
Dear Bug Team:
I encountered a bug when trying to make a barplot with the pictex
output device.
The following commands demonstrate the bug:
-----------------------------------------------
> errors <- c(3.08, 35.38, 33.85, 20.00, 7.69)
> errors
[1] 3.08 35.38 33.85 20.00 7.69
> pictex()
> barplot(errors)
Error: Bad units specified in GConvert, please report!
>
2023 Aug 19
1
Determining Starting Values for Model Parameters in Nonlinear Regression
Thank you so much Dr. Nash, I truly appreciate your kind and valuable
contribution.
Cheers,
Paul
El El s?b, 19 de ago. de 2023 a la(s) 3:35 p. m., J C Nash <
profjcnash at gmail.com> escribi?:
> Why bother. nlsr can find a solution from very crude start.
>
> Mixture <- c(17, 14, 5, 1, 11, 2, 16, 7, 19, 23, 20, 6, 13, 21, 3, 18, 15,
> 26, 8, 22)
> x1 <- c(69.98, 72.5,
2017 Apr 18
3
LLVM is getting faster, April edition
> On Apr 11, 2017, at 10:25 PM, Madhur Amilkanthwar via llvm-dev <llvm-dev at lists.llvm.org> wrote:
>
> I am interested in knowing more.
> 1. What benchmarks does LLVM community use for compile-time study? I see CTMark, but is that the only one being analyzed?
CTMark is not cast in stone. Its purpose is for the community to have a trackable proxy for the overall llvm test
2005 Apr 11
0
plotting Principle components vs individual variables.
Dear R,
I'm trying to plot the first principle component of an analysis vs the first
variable but am having trouble. I have no trouble doing the initial plot
but have difficulty thereafter.
First I want to highlight some points of the following data set
list(running)
[[1]]
X100m X200m X400m X800m X1500m X5K X10K Marathon
Argentina 10.39 20.81 46.84 1.81
2023 Aug 20
1
Determining Starting Values for Model Parameters in Nonlinear Regression
The cautions people have given about starting values are worth heeding. That nlxb() does well in many cases is useful,
but not foolproof. And John Fox has shown that the problem can be tackled very simply too.
Best, JN
On 2023-08-19 18:42, Paul Bernal wrote:
> Thank you so much Dr. Nash, I truly appreciate your kind and valuable contribution.
>
> Cheers,
> Paul
>
> El El
2023 Aug 19
1
Determining Starting Values for Model Parameters in Nonlinear Regression
Dear friends,
Hope you are all doing well and having a great weekend. I have data that
was collected on specific gravity and spectrophotometer analysis for 26
mixtures of NG (nitroglycerine), TA (triacetin), and 2 NDPA (2 -
nitrodiphenylamine).
In the dataset, x1 = %NG, x2 = %TA, and x3 = %2 NDPA.
The response variable is the specific gravity, and the rest of the
variables are the predictors.
2005 Apr 11
1
plotting Principal components vs individual variables.
At the cost of breaking the thread I'm going to change your subject and
replace 'Principle' by 'Principal'. I just can't stand it any longer...
OK, here is how I would solve your other problems. First put
> wh <- c("USA", "New Zealand", "Dominican Republic",
"Western Samoa", "Cook Islands")
> ind
2010 May 09
1
Plot polygon in 3D with rgl
Dear R-helpers, an rgl-ers in particular,
what is the easiest way to plot a section of a plane in 3D, that is
given by the xyz coordinates of the outline?
Suppose I have a polygon - which I know for sure is a set of
coordinates on the same plane. One method I found is to use surf.tri
from the geometry package, and then plot the triangles with
rgl.triangles. This method is not perfect though,
2011 Aug 02
2
Memory limit in Aggregate()
Dear all,
I am trying to aggregate a table (divided in two lists here), but get a
memory error.
Here is the code I'm running :
sessionInfo()
print(paste("memory.limit() ", memory.limit()))
print(paste("memory.size() ", memory.size()))
print(paste("memory.size(TRUE) ", memory.size(TRUE)))
print(paste("size listX ", object.size(listX)))
2012 Aug 01
4
as.date: do not know how to convert 'test[1]' to class "Date"
I have an object, which I pull in from a csv file here
http://r.789695.n4.nabble.com/file/n4638691/jan_2011.csv jan_2011.csv
mydata <- read.csv("jan_2011.csv", header=TRUE, sep=",")
> head(mydata)
Delivery.Date Hour.Ending Repeated.Hour.Flag Settlement.Point
Settlement.Point.Price
1 01/01/2011 01:00 N HB_BUSAVG
2004 Jan 06
0
(no subject)
I haven't (yet) tried your patch, but here's some information you may
find useful:
There exists a "krbafs" library, which is in effect a port of KTH
Kerberos's libkafs to MIT Kerberos V
(http://web.mit.edu/openafs/krbafs/). But KTH-krb is (of course) a
clone of Kerberos 4, so libkrbafs requires Kerberos 4 credentials.
(I've only built krbafs on OS X, and its "home
2007 Aug 02
1
simulate() and glm fits
Dear All,
I have been trying to simulate data from a fitted glm using the simulate()
function (version details at the bottom). This works for lm() fits and
even for lmer() fits (in lme4). However, for glm() fits its output does
not make sense to me -- am I missing something or is this a bug?
Consider the following count data, modelled as gaussian, poisson and
binomial responses:
counts
2011 Nov 15
0
Forescasting using predict() in an object of class arimax when there is an outlier IO in the model.
Forescasting using predict() in an object of class arimax when there is an
outlier IO in the model.
Hi R users
I have a problem when a use the predict() method in an object of class
arimax ( These objects are the results of the implementation of the function
arimax() from the TSA library) . The object is a model of a time series in
which I identified an IO oulier at the element 33 of the serie
2007 Apr 14
13
Ambisonics in Ogg Vorbis
On 2/28/07, Ivo Emanuel Gon?alves <justivo@gmail.com> wrote:
> On 2/28/07, Ralph Giles <giles@xiph.org> wrote:
> > Well, there are todo pages at wiki.xiph.org, but I meant more in the
> > community folklore sense. My point is a roadmap doesn't help much unless
> > there are people committed to making things happen. That's been the
> > problem with a