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", "red", "#7F0000"))
m = 600 # define 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) # reshape as square matrix of complex numbers
Z = 0 # initialize Z to zero
X = array(0, c(m,m,20)) # initialize output 3D array
for (k in 1:20) { # loop with 20 iterations
Z = Z^2+C # the central difference equation
X[,,k] = exp(-abs(Z)) # capture results
}
write.gif(X, "Mandelbrot.gif", col=jet.colors, delay=100)
however, the gif file created by this looks much worse than what is shown on
R wiki page, see the comparison as follows (left one is what i created)
http://r.789695.n4.nabble.com/file/n2591429/Picture1.png
--
View this message in context:
http://r.789695.n4.nabble.com/why-I-could-not-reproduce-the-Mandelbrot-plot-demonstrated-on-R-wiki-tp2591429p2591429.html
Sent from the R help mailing list archive at Nabble.com.
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
