Displaying 20 results from an estimated 300 matches similar to: "why I could not reproduce the Mandelbrot plot demonstrated on R wiki"
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 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 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
2003 Sep 17
3
Fractals in R and having fun! (and more persp and color)
Well, I started playing with fractals in R, and wrote a function to
generate de Mandelbrot set, which might
be of interest to some people
###########################################################################
# Mandelbrot set
###########################################################################
mandelbrot <- function(x = c(-3.0, 1.0), # x coordinates
y =
2010 Sep 21
1
Colorramp in Maptools, how to choose min and max values for the fg= argument
Hello,
I am using maptools for plooting geographical data.
The colour of the region indicates some region dependent value
(population for example).
I pass the colours of the regions to the plot.Map function by defining
the foreground colour:
jet.colors = colorRampPalette(c("#00007F", "blue", "#007FFF", "cyan",
"#7FFF7F", "yellow",
2013 Feb 04
1
is it possible to create a trellis object with multiple colorkeys/z-scale axis?
Dear R users-
Do the lattice/latticeExtra packages support multiple tileplots with unique
colorkeys? I am trying to create a visualization of the encounter rate of
certain stocks of salmon across two years. The issue I am having is that
some stocks are encountered at much higher rates than others.the high
encounter rate for one stock washes out the patterns I'm hoping to visualize
across the
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
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
2012 Dec 04
0
latticeExtra tileplot question - tiles are not all the same size, need help.
Hello,
I have been creating many tileplots to try and illustrate the relative
abundance of fish through space and time. My issue is that the tiles that
border the plot are smaller than those in the center of the plot. In the
example I've provided the effect is pretty minor (I'm hoping this will be an
adequate example as I had the code already created/data uploaded). However,
I have other
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
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
2006 Jan 09
0
need palette of topographic colors similar to topo.colors ()
I will second Roger's suggestion, colorRampPalette is a great function for
creating your own palettes. For example, Matlab's jet palette (also
available in fields package under peculiar name 'tim.colors') can be defined
by:
jet.colors = colorRampPalette(c("#00007F", "blue", "#007FFF", "cyan",
"#7FFF7F", "yellow",
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 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.
2009 Dec 02
1
[LLVMdev] LLVM 2.6 -> SVN breaks this
The LLVM 2.6-compatible IR below is derived from the HLVM test suite and is
one of the things I've noticed going wrong. However, I just discovered that
it works with LLVM 2.6 and with LLVM SVN when run through lli or llc
without -tailcallopt but when I use:
$ llvm-as -f aout.ll
$ llc -tailcallopt -f aout.bc -o aout.s
$ gcc -lm aout.s -o aout
and the latest LLVM SVN it starts to print
2011 Oct 19
6
[LLVMdev] ANN: libclc (OpenCL C library implementation)
Hi everybody,
the compiler design lab at Saarland University (chair of Sebastian Hack)
is also working on an LLVM-based OpenCL driver.
The project started as a use-case for our "Whole-Function Vectorization"
library, which allows to transform a function to compute the same as W
executions of the original code by using SIMD instructions (W = 4 for
SSE/AltiVec, 8 for AVX).
The
2013 Mar 01
4
[LLVMdev] NVPTX CUDA_ERROR_NO_BINARY_FOR_GPU
I'm building this with llvm-c, and accessing these intrinsics via calling
the intrinsic as if it were a function.
class F_SREG<string OpStr, NVPTXRegClass regclassOut, Intrinsic IntOp> :
NVPTXInst<(outs regclassOut:$dst), (ins),
OpStr,
[(set regclassOut:$dst, (IntOp))]>;
def INT_PTX_SREG_TID_X : F_SREG<"mov.u32 \t$dst, %tid.x;",