问题
I have two sets of data, (Ax, Ay; Bx, By). I'd like to plot both of these data sets on a scatter plot with different colors, but I can't seem to get it to work, because it seems scatter() does not work like plot(). Is it possible to do this?
I've tried...
scatter(Ax, Ay, 'g', Bx, By, 'b')
And
scatter(Ax, Ay, 'g')
scatter(Bx, By, 'b')
The first way returns an error. The latter only plots the Bx/By data.
回答1:
Try using hold on with the second example.
回答2:
plot (ax,ay,'g.') generates a scatter plot with green dots
if you want bigger circles, you can use
plot (ax,ay,'g.', 'MarkerSize', XX) %XX = 20 or whatever
To make open circles
plot (ax, ay, 'go')
As you know, plot can be chained, so you can do it one go with
plot (ax, ay, 'go', bx, by, 'bo')
The difference between plot and scatter is that scatter lets you specify the marker size, but you're not asking to do that here.
回答3:
Another option is to use gscatter. The parameters are different, but it is sometimes more useful than scatter(...); hold on; scatter(...);
来源：https://stackoverflow.com/questions/2481688/matlab-plot-multiple-data-sets-on-a-scatter-plot