Hi,
I have three variable X, Y, Z of length 10000 points each .Z represent signal strength. I need to generate animated X,Y plot (scatter) with signal strength represented by color. For persistanace i am plotting 10 new color coded points each frame and making old points white . Code given below.
for i1 = 1:10:(numpoints-10), plot(xP(1:i1-1),yP(1:i1-1),'w.','markersize',18) ;% Making old points to white
hold on scatter(xP(i1+(0:9)),yP(i1+(0:9)),32,zP(i1+(0:9)),'filled') % Adding 10 new points for persistence
set(gca,'Color','k'); axis([xMin, xMax, yMin, yMax]) caxis([zMin, zMax]) hold off; drawnowend
Instead of making all the old points 'White' , I want to start with grey scale and increase an old point's intensity (alpha) every time, when any of newly added 10 point is same as old point. I would appreciate any suggesion in towards solution.
regards
jayant
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