search for: mandelbrot

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...

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...

...ed 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... > > 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 Mari...

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 --------------------- D...

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", "yello...

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 version deleted]]

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&qu...

...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 Zipf 0.11033 -0.74705 61.0465 340.9567 346.0219 Mandelbrot 100.52 -2.312 24.084 4.2271 286.1372 293.7350 I want to include the table shown above into the latex document (using xtable). library(xtable) xtable(mod) Error in UseMethod("xtable") : no applicable method for 'xtable' applied to an object of class "radfit&...

...rs would see a performance hit (so we have a different private change to address that). As a final point here, to give more weight to this, I took a random bit of code I found on github that that has floating-point fast-math opportunities in it, and experimented with it. (I just searched for 'mandelbrot', and took the first thing I found.) Specifically: https://gist.github.com/andrejbauer/7919569 This test-case has a few divisions in it, but it doesn't contain any reciprocal-transformation opportunities (so '-f[no-]reciprocal-math' should essentially be a no-op). The old Clan...

...The first article describes a compiler written in only 228 lines of code that can execute interesting programs:   http://ocamlnews.blogspot.com/2009/06/compiler-development-part-1.html For example, the compiler described in the article can execute the following OCaml-like program to print the Mandelbrot set: # let rec pixel((n, zr, zi, cr, ci) : int * float * float * float * float) : unit =     if n = 65536 then print_char ' ' else       if zr * zr + zi * zi >= 4.0 then print_char '.' else         pixel(n+1, zr * zr - zi * zi + cr, 2.0 * zr * zi + ci, cr, ci);; # let rec row((i...

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

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

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...

...ent > > private change to address that). > > As a final point here, to give more weight to this, I took a random > bit of code > > I found on github that that has floating-point fast-math opportunities > in it, > > and experimented with it. (I just searched for 'mandelbrot', and took the > > first thing I found.) Specifically: > > https://gist.github.com/andrejbauer/7919569 > > This test-case has a few divisions in it, but it doesn't contain any > > reciprocal-transformation opportunities (so '-f[no-]reciprocal-math' > sho...

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 <stdio.h> #include &l...

...lt;http://jijo.cjb.net> GPG Fingerprint: 0CCA 8EE2 2EEB 25E2 AB04 06F7 1BB9 E634 9B87 56EE ------------------------------------------------------------------- "A fractal is by definition a set for which the Hausdorff Besicovitch dimension strictly exceeds the topological dimension." -- Mandelbrot, "The Fractal Geometry of Nature"

...scovered 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 incorrect output (it is supposed to print the Mandelbrot set in ASCII). Perhaps this is a repro for the new TCO-related bug? ; ModuleID = 'aout.bc' %0 = type { i32, %1 } %1 = type { i8*, i32, i8*, i8* } %2 = type { i32 (%1)*, i32 (%1)* } %3 = type { i32, %1, %0, %1 } %4 = type { i32, double, double, double, double } %5 = type {...

...re published at CGO'11: http://dx.doi.org/10.1109/CGO.2011.5764682 In contrast to Clover and pocl, we aimed at maximum performance before full support of the API (which simply requires more manpower than one PhD student). The driver was evaluated using benchmarks from the AMD APP SDK, e.g. Mandelbrot, NBody, FastWalshTransform, Histogram, BlackScholes, DCT, ... Our measurements show that our driver outperforms both Intel's and AMD's CPU driver for almost all of the benchmarks. We plan to release both the vectorization library as well as the OpenCL driver under a BSD-style license, bu...

...; http://dx.doi.org/10.1109/CGO.2011.5764682 > > In contrast to Clover and pocl, we aimed at maximum performance before > full support of the API (which simply requires more manpower than one > PhD student). > The driver was evaluated using benchmarks from the AMD APP SDK, e.g. > Mandelbrot, NBody, FastWalshTransform, Histogram, BlackScholes, DCT, > ... > Our measurements show that our driver outperforms both Intel's and > AMD's > CPU driver for almost all of the benchmarks. > > We plan to release both the vectorization library as well as the OpenCL > dri...

...;m not sure the intrinsics are getting compiled > > correctly. > > > > In addition, when I try load the module using CUDA, I get an > > error: CUDA_ERROR_NO_BINARY_FOR_GPU. I'm running this on a 2012 MBP > > with a 640M GPU. > > > > PTX Code (for a mandelbrot calculation): > > > > // > > // Generated by LLVM NVPTX Back-End > > // > > > > .version 3.1 > > .target sm_10, texmode_independent > > .address_size 64 > > > > .func (.reg .b32 func_retval0) INT_PTX_SREG_CTAID_X > > ( > > &g...