Re: newbie - matrix fill from vectors

[Adam Majewski]

On 03.11.2011 22:20, Juan Pablo Carbajal wrote:
> On Thu, Nov 3, 2011 at 9:28 PM, Adam Majewski<address@hidden>  wrote:
> > Hi,
> >
> > I want to have am matrix of complex numbers representing quadrant plane
> >
> >
> > # integer coordinate = pixels
> > iSide =5; # side of matrix
> >
> >
> > # world ( float) coordinate - dynamical (Z) plane
> > dSide= -2.0
> > Zxmin = -dSide;
> > Zxmax = dSide;
> > Zymin = -dSide;
> > Zymax = dSide;
> >
> > # vectors of coordinate
> > vZx = linspace(Zxmin,Zxmax,iSide)
> > vZy = linspace(Zymin,Zymax,iSide)
> >
> > mZ=zeros(iSide,iSide); # my matrix to fill
> >
> > How can I fill this matrix ( not using 2 loops) from vectors ?
> >
> >
> >
> > TIA
> >
> > Adam
> >
> >
> > ============ loop code =========
> >
> > stepy = (Zymax - Zymin)/(iSide - 1); # pixel height
> > stepx = (Zxmax - Zxmin)/(iSide - 1); # pixel width
> >
> > # scan all pixels of image and compute color
> > for iy = 1:iHalfSide
> >   Zy = Zymax - (iy-1)*stepy; # invert y axis
> >   for ix= 1:nx
> >     Zx = Zxmin + ix*stepx; # map from screen to world coordinate
> >
> >   end
> > end
> >
> > _______________________________________________
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> > address@hidden
> > https://mailman.cae.wisc.edu/listinfo/help-octave
>
> What should be in mZ?
> In your code you create Zy and Zx, but do not fill mZ.

Hi,

Thx for answer.
Sorry for not clear question
I was trying to do make vectorised ( fast) code like in this image :
http://commons.wikimedia.org/wiki/File:Mandelbrot_Creation_Animation_%28800x600%29.gif


I have made :
http://commons.wikimedia.org/wiki/File:Golden_Mean_Quadratic_Siegel_Disc_Speed.png
Can I vectorise this code ?

TIA

Adam