[R] speed

[Matthew Dowle]

Your choice of subject line alone shows some people that you missed some 
small details from the posting guide. The ability to notice small details 
may be important for you to demonstrate in future.  Any answer in this 
thread is unlikely to be found by a topic search on subject lines alone 
since "speed" is a single word.

One fast way to increase your reputation is to contribute.  You now have an 
opportunity.  If you follow Jim's good advice, discover the answer for 
yourself, and post it back to the group, changing the subject line so that 
its easier for others to find in future,  thats one way you can contribute 
and increase your reputation.  If you don't do that, thats your choice. It 
is entirely up to you. Whatever action you take next, even doing nothing is 
an action, it is visible in public for everyone to search back and find out 
within seconds.

HTH

"Adam Majewski" <adammaj1 at o2.pl> wrote in message 
news:hn6fp4$2gp$1 at dough.gmane.org...
> Hi,
>
> I have found some example of R code :
> http://commons.wikimedia.org/wiki/File:Mandelbrot_Creation_Animation_%28800x600%29.gif
>
> When I run this code on my computer it takes few seconds.
>
> I wanted to make similar program in Maxima CAS :
>
> http://thread.gmane.org/gmane.comp.mathematics.maxima.general/29949/focus=29968
>
> for example :
>
> f(x,y,n) :=
> block([i:0, c:x+y*%i,ER:4,iMax:n,z:0],
> while abs(z)<ER and i<iMax
>    do (z:z*z + c,i:i+1),
> min(ER,abs(z)))$
>
> 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
>