Displaying 20 results from an estimated 5000 matches similar to: "Fractals in R and having fun! (and more persp and color)"
2002 Aug 10
2
fractals
Dear R People:
Does anyone have any code for Fractals, chaos,
or anything like that, please?
This is strictly for demo purposes...decorative only.
This is R version 1.5.1 for Windows.
Thank you in advance!
Have a great weekend!
Sincerely,
Erin Hodgess
Associate Professor
Department of Computer and Mathematical Sciences
University of Houston - Downtown
1 Main Street
Houston, TX 77002
2017 Nov 03
2
fractales
Mira el conjunto de mandelbrot en r cómo mola
https://www.google.es/amp/s/www.r-bloggers.com/the-mandelbrot-set-in-r/amp/
El 3 nov. 2017 4:20 PM, "eric" <ericconchamunoz en gmail.com> escribió:
> hola luis, podrias explicarte un poco mas ? que quieres decir con "obtener
> fractales de una imagen" ?
>
> Puedes construir una imagen con fractales, pero
2012 Apr 16
2
Problems with subset, droplevels and lm: variable lengths differ
[Env: R 2.14.2 / Win Xp]
In the script below, I want to select some variables from
rrcov::OsloTransect, delete cases with
any missing data, and subset the data frame Oslo to remove cases for two
levels of the
factor litho that occur with low frequency.
The checks I run on my new data frame Oslo look OK, but I when I try to
fit a multivariate
linear model with lm(), I am getting an error:
2009 Feb 03
2
ThinkCell type waterfall charts in R?
Hi all,
with PowerPoint and ThinkCell one can draw something they call waterfall
chart and it looks like this:
http://www.think-cell.com/products/images/waterfall.gif
I found discussions on waterfall charts in the archive of this
mailinglist, but unfortunately they looked totally different. Other
names for this type of plot seem to be bridge chart, cascade chart,
stair case chart, etc. but
2017 Nov 03
3
fractales
Hola
Quisiera saber si podrían informar como puedo hacer para obtener fractales de una imagen con R. Hay algún paquete? o tutorial que me guíe?
Desde ya muchas gracias.
Atentamente, Luis
2007 Apr 13
2
Fractals with R
Hi everybody,
I put some R-code to a web page for drawing fractals. See
http://fractalswithr.blogspot.com/
If you have some R-code for fractal images, I'm willing to include
them to the page.
Has somebody tried L-systems or Markov algorithm (http://
en.wikipedia.org/wiki/Markov_algorithm) with R?
Best wishes,
Atte Tenkanen
University of Turku, Finland
2010 Sep 15
0
[LLVMdev] Tutorial, LLVM assembly with fractals part I
Hi all, just a quick link for those interested in a tutorial about implementing Mandelbrot fractals in LLVM assembly:
http://blog.zanopia.org/2010/09/understanding-llvm-assembly-with-fractals-part-i.html
Cheers,
Giorgio Regni
2003 Oct 28
1
stacking histograms
Hi,
I have a set of observations which are divided into two sets A and B.
I have some code that bins the dataset into 10 bins based on the max and
min of the observed values.
I would like to make a histogram of A & B using my calculated bins but
plot the distribution of B on top of A (like a stacked barplot). This is
possible since both sets A & B are binned using the same bin ranges.
1999 Dec 27
1
Anything for fractals ?
Hallo,
I am a newbie to R and desperatley seeking some material about fractal
geometry. I found the great library on wavelet analysis of images and
I'm now also keen on finding a similar package for calculating fractal
parameters for given images.
Does anybody know something about such a package? Every hint is greatly
appreciated!! I searched already the database, but did not find anything
2005 Oct 04
6
Animation of Mandelbrot Set
Hi,
I was playing with Mandelbrot sets and come up with the following code, I
thought I would share:
library(fields) # for tim.colors
library(caTools) # for write.gif
m = 400 # grid size
C = complex( real=rep(seq(-1.8,0.6, length.out=m), each=m ),
imag=rep(seq(-1.2,1.2, length.out=m), m ) )
C = matrix(C,m,m)
Z = 0
X = array(0, c(m,m,20))
for (k in 1:20) {
Z =
2010 Sep 24
2
why I could not reproduce the Mandelbrot plot demonstrated on R wiki
I am trying to reproduce the nice looking of Mandelbrot demonstrated by R
wiki page by the following code:
library(caTools) # external package providing write.gif function
jet.colors = colorRampPalette(c("#00007F", "blue", "#007FFF", "cyan",
"#7FFF7F",
"yellow", "#FF7F00",
2010 Oct 11
1
plotting Zipf and Zipf-Mandelbrot curves in R
Using R, I plotted a log-log plot of the frequencies in the Brown Corpus
using
plot(sort(file.tfl$f, decreasing=TRUE), xlab="rank", ylab="frequency",
log="x,y")
However, I would also like to add lines showing the curves for a Zipfian
distribution and for Zipf-Mandelbrot.
I have seen these in many articles that used R in creating graphs.
Thank you!
[[alternative HTML
2003 Sep 20
4
persp graphs
Hi,
I am doing my way on R, with much experimenting. So, I am trying to plot a 3d
graphic ussing "persp" and entering a data set (attached) of UTM coordinates
as x,y and a pH values as z. However when I try an error message comes out
telling that increasing x and y values are expected. Jus ordering the first
vector does not help, and, of course, order the first two independently
2003 Oct 02
0
R] Re: Mandelbrot set and C code --
You need to install the tools needed to build packages from source. You can
read about it in Q3.1 of R for Windows FAQ.
Andy
> -----Original Message-----
> From: Rex Bryan Dell1700 [mailto:rexbryan1 at comcast.net]
> Sent: Thursday, October 02, 2003 12:15 PM
> To: r-help at stat.math.ethz.ch
> Subject: [R] R] Re: Mandelbrot set and C code --
>
>
> Wizards...
>
2003 Oct 02
0
R] Re: Mandelbrot set and C code --
Wizards...
With regards to Mario's Mandelbrot.c programming -- would
some kind wizard show how to compile and run his code on
a Win installation. I'm looking for a simple "cookbook" example in
the same manner that Mario show for Linux.
I have Win2000 on this machine.
REX
--------------- Original Message ---------------------
Date: Wed, 01 Oct 2003 14:09:36 +0100
From: ucgamdo
2011 Feb 04
2
vegan and sweave using xtable
Dear all,
Using:
library(vegan)
data(BCI)
mod <- radfit(BCI[1,])
mod
RAD models, family poisson
No. of species 93, total abundance 448
par1 par2 par3 Deviance AIC BIC
Null 39.5261 315.4362 315.4362
Preemption 0.042797 21.8939 299.8041 302.3367
Lognormal 1.0687 1.0186 25.1528 305.0629 310.1281
2017 Sep 29
2
Trouble when suppressing a portion of fast-math-transformations
Hi all,
In a mailing-list post last November:
http://lists.llvm.org/pipermail/llvm-dev/2016-November/107104.html
I raised some concerns that having the IR-level fast-math-flag 'fast' act as an
"umbrella" to implicitly turn on all the lower-level fast-math-flags, causes
some fundamental problems. Those fundamental problems are related to
situations where a user wants to
2012 Apr 23
2
zipfR help
Hi,
I have a question on generating random variables based on zipf-mandelbrot
distribution.
So when I execute the following lines:
ZM = lnre ("zm", alpha = 2/3, B=0.1)
zmsample = rlnre (ZM, n =100)
zmsample
It generates 100 random values based on a zipf-mandelbrot distribution as
below. But how do I make sure the generated random number is within the
range of 1 - 6000 only? Can I
2009 Feb 26
2
[LLVMdev] Impressive performance result for LLVM: complex arithmetic
Following a discussion about numerical performance on comp.lang.functional
recently I just tried running a simple C mandelbrot benchmark that uses C99's
complex arithmetic using gcc and llvm-gcc on a 2.1GHz Opteron 2352 running
Debian:
gcc: 5.727s
llvm-gcc: 1.393s
There is still 20% room for improvement but LLVM is >4x faster than gcc here.
Sweet.
Here's the code:
#include
2003 Mar 03
2
saving a plot to a file
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Hash: SHA1
Hi,
I'm a new user of R and have managed to make a plot of a histogram. Is there
any way I set the title and axes labels and then save the plot as an image
(png/gif)?
Thanks
- --
- -------------------------------------------------------------------
Rajarshi Guha <rajarshi at presidency.com> <http://jijo.cjb.net>
GPG