search for: user_preambl

...am 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