Is it possible to colour a scatter3 according to its mean and maximum value

i have velocities distributed in a 3d scatter plot along a cosine hill prrofile . i want to view where the velocity is increasing and where it is decresing its value.

Answer 1

[Dave B]

You can color the points in a scatter3 by passing in a vector specifying the value you'd like to map onto color as the 5th argument to scatter3

[xi,yi]=meshgrid(1:30,1:30);
zi=gausswin(30)*gausswin(30)';
[fx,fy]=gradient(zi);

nexttile
ci=zi;
scatter3(xi(:),yi(:),zi(:),10,ci(:),'filled')
colorbar

nexttile
ci=fx;
scatter3(xi(:),yi(:),zi(:),10,ci(:),'filled')
colorbar

nexttile
ci=fy;
scatter3(xi(:),yi(:),zi(:),10,ci(:),'filled')
colorbar

nexttile
ci=sqrt(fx.^2+fy.^2);
scatter3(xi(:),yi(:),zi(:),10,ci(:),'filled')
colorbar

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