how to change the transparency of individual colors in the colormap of an image?
Hello,
I’m using bubblechart to display my data as shown below;
bubblechart(x2xz,z2xz,ones(size(x2xz)),n2xz,’MarkerFaceAlpha’,0.1,’MarkerEdgeAlpha’,0.2);
-this works. However it would be better if I could make MarkerFaceAlpha a variable, so that it changes based on the value of n2xz (which currently controls the colour of the bubbles). Unfortunately MarkerFaceAlpha has to be a scalar, not a vector, with bubblechart.
The plot command accepts colours in this format (where the fourth column is the transparency); ‘Color’,[0.0 0.0 1.0 0.3], but when I build a colormap with four columns and try to use that instead of using the MarkerFaceAlpha option, the colormap command rejects it.
I have googled this and searched Matlab Answers, but nothing useful was found.
Any suggestions would be gratefully received. Thank you.
Gordon CooperHello,
I’m using bubblechart to display my data as shown below;
bubblechart(x2xz,z2xz,ones(size(x2xz)),n2xz,’MarkerFaceAlpha’,0.1,’MarkerEdgeAlpha’,0.2);
-this works. However it would be better if I could make MarkerFaceAlpha a variable, so that it changes based on the value of n2xz (which currently controls the colour of the bubbles). Unfortunately MarkerFaceAlpha has to be a scalar, not a vector, with bubblechart.
The plot command accepts colours in this format (where the fourth column is the transparency); ‘Color’,[0.0 0.0 1.0 0.3], but when I build a colormap with four columns and try to use that instead of using the MarkerFaceAlpha option, the colormap command rejects it.
I have googled this and searched Matlab Answers, but nothing useful was found.
Any suggestions would be gratefully received. Thank you.
Gordon Cooper Hello,
I’m using bubblechart to display my data as shown below;
bubblechart(x2xz,z2xz,ones(size(x2xz)),n2xz,’MarkerFaceAlpha’,0.1,’MarkerEdgeAlpha’,0.2);
-this works. However it would be better if I could make MarkerFaceAlpha a variable, so that it changes based on the value of n2xz (which currently controls the colour of the bubbles). Unfortunately MarkerFaceAlpha has to be a scalar, not a vector, with bubblechart.
The plot command accepts colours in this format (where the fourth column is the transparency); ‘Color’,[0.0 0.0 1.0 0.3], but when I build a colormap with four columns and try to use that instead of using the MarkerFaceAlpha option, the colormap command rejects it.
I have googled this and searched Matlab Answers, but nothing useful was found.
Any suggestions would be gratefully received. Thank you.
Gordon Cooper bubblechart, transparency MATLAB Answers — New Questions