How can I plot lines with varying opacities/colors at each point?

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I have a matrix of data that shows up as 3 differently colored lines.
x=[1 2 3 4 5]
y=[2 1 2 4 3;
1 3 2 1 1;
2 1 4 5 4]
y was found by binning data with histc and then averaging those bins. I have another matrix with the number of bin observations that corresponds to each data point in y:
b=[9 9 9 9 9;
9 9 7 4 2;
9 3 3 2 1]
I want to plot(x,y), with line opacity indicating (adding varying amounts of white) bin observations. Basically, the line segments around each point would be "dimmer" if they reflect less underlying data. So in this example, the 1st line would be fully opaque, and the next two lines would decrease in opacity from left to right.
Does anyone know a good way to do this?

Accepted Answer

Mischa Kim
Mischa Kim on 17 Feb 2014
Will, check out this answer. Just copy-paste-execute the code snippet and adapt it your needs.

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