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

Question

Will Adler 2014-2-17

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/116384-how-can-i-plot-lines-with-varying-opacities-colors-at-each-point

回答： Mischa Kim 2014-2-17

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?

Thanks!