Hard to say. You might want to run a profile of each set of code and see where it is spending its time. It looks like from the R code that they are using vectorized operations and depending on how some of them are implemented, they might be calling C code to do most of the work. With the proper use of vectorized operations, R can be pretty fast.
I don't understand CAS code, but it looks like there is a lot of iteration, and function calls, that might be adding to the time. Profiling will help you localize the issues. On Tue, Mar 9, 2010 at 4:49 PM, Adam Majewski <adamm...@o2.pl> wrote: > 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 > > ______________________________________________ > 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<http://www.r-project.org/posting-guide.html> > and provide commented, minimal, self-contained, reproducible code. > -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem that you are trying to solve? [[alternative HTML version deleted]] ______________________________________________ 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.
