Scatter plot markers dont show colors of the colormap

.

[dpb]

scatter doesn't know about the density of location; it just draws a marker at the location.

You'll need to use histcounts2 to bin the data in XY coordinate space and then use that count array as the color variable.

[Sara Loren]

Thanks for the response. This code worked for me.

x = linspace(0,3*pi,200);
y = cos(x) + rand(1,200);
sz = 10;
c = linspace(1,100,length(x));
scatter(x,y,sz,c,'filled')

Answer 1

[Cris LaPierre]

You could try using the syntax for scatter that includes color: scatter(x,y,sz,c)

You'd have to include a color for each marker.

[dpb]

Yeah, but how to obtain the color that is representative of the point density...be interesting if OP would attach the data file to play with; I've not tried such a thing that can think of having done.

A search uncovered that one of the mapping toolboxen has a topographical density plotting facility with it -- that would be a great addition to add to general graphics types.

[Cris LaPierre]

Good points. I wonder if hist3 with a tiled view would work.