How can I weight the marker size in gscatter?

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Christian
Christian 2016-10-11
评论： Christian 2016-10-13
Hello,
I'm using gscatter to plot data by group. I have two vectors of size 100x1 that contain the x and y value, called x and y. I also have a vector of the same size, w, that contains weights. Now, I'd like to weigh the scatter dots by this matrix w. I tried something like
h = gscatter(x,y,gr,linspecer(length(b)-1),'.',30);
h.MarkerSize = w*30;
but it looks like Matlab only accepts a scalar for the marker size.
Thanks for your help.

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采纳的回答

Walter Roberson
Walter Roberson 2016-10-11
编辑：Walter Roberson 2016-10-11
gscatter() creates lines, and lines can only have one marker size per line.
Consider using multiple scatter() calls instead, one per group (because scatter can only handle one marker shape per call)
  2 个评论
Christian
Christian 2016-10-13
Thanks, Walter. I wonder how I can then add the legend.
markersize = 30;
Col = linspecer(3);
hold on
for c = 1:3
scatter(x(gr==c),y(gr==c),markersize*w(gr==c),'MarkerEdgeColor',Col(c,:));
end
hold off
legend({'Gr1','Gr2','Gr3'});
This clearly doesn't work. It only gives me an empty framed box. Thanks for your ideas.
Christian
Christian 2016-10-13
I got it to work.
markersize = 30;
Col = linspecer(3);
h = [];
hold on
for c = 1:3
h = [h scatter(x(gr==c),y(gr==c),markersize*w(gr==c),'MarkerEdgeColor',Col(c,:))];
end
hold off
legend(h,{'Gr1','Gr2','Gr3'});

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