Matlab drawing black spots on two / three-dimensional drawings

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To use this function, you need to install Climate Data Toolbox

A two-dimensional

1. Draw a grid (pcolor)

[X,Y,Z] = peaks(1000);
pcolor(X,Y,Z)
shading interp
hold on

2. Create a mask

mask = Z>2.5;

3. Draw black dots

color Attribute controls the color of the point , Default is black ;density Attribute controls the density of points , The default is 100;marker Symbol of attribute control point , The default is point ;markersize Attribute controls the size of the point , The default is 6.

stipple(X,Y,mask,'color',[0,0,0],'density',100,'marker','.','markersize',10);

The three dimensional

1. 3d drawing (surf)

[X,Y,Z] = peaks(1000);
surf(X,Y,Z)
shading interp
hold on

2. Draw black dots

h=stipple(X,Y,mask,'color',[0,0,0],'density',100,'marker','.','markersize',6);

3. Change handle h The data of

x=X(mask);
y=Y(mask);
z=Z(mask);
h.XData=x(1:500:end);
h.YData=y(1:500:end);
h.ZData=z(1:500:end);