[R] speed
Adam Majewski
adammaj1 at o2.pl
Tue Mar 9 22:49:24 CET 2010
Hi,
I have found some example of R code :
http://commons.wikimedia.org/wiki/File:Mandelbrot_Creation_Animation_%28800x600%29.gif
When I run this code on my computer it takes few seconds.
I wanted to make similar program in Maxima CAS :
http://thread.gmane.org/gmane.comp.mathematics.maxima.general/29949/focus=29968
for example :
f(x,y,n) :=
block([i:0, c:x+y*%i,ER:4,iMax:n,z:0],
while abs(z)<ER and i<iMax
do (z:z*z + c,i:i+1),
min(ER,abs(z)))$
wxanimate_draw3d(
n, 5,
enhanced3d=true,
user_preamble="set pm3d at b; set view map",
xu_grid=70,
yv_grid=70,
explicit('f(x,y,n), x, -2, 0.7, y, -1.2, 1.2))$
But it takes so long to make even one image ( hours)
What makes the difference, and why R so fast ?
Regards
Adam
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