Heat Map Histogram with gnuplot

Question

I'm working in Gnuplot, and I have a graph looking roughly like the following:

If I want to have the color of the line change color depending on the curves's values, what's the most straightforward way to make that happen?

Thanks!

Answer 1

Maybe these three articles is helpful:

http://gnuplot-surprising.blogspot.com/2011/09/gradient-colored-curve-in-gnuplot0.html

http://gnuplot-surprising.blogspot.com/2011/09/gradient-colored-curve-in-gnuplot1.html

http://gnuplot-surprising.blogspot.com/2011/09/gradient-colored-curve-in-gnuplot2.html

Answer 2

Does the answer to this question help?

For example:

plot "./file.dat" u 1:2:2 with lines palette

where file.dat contains your data, the first column is the x axis and the second column is the y axis.

The repetition of the 2 indicates that the second column is also used for the colour.

Answer 3

I know there is a function (which i use quite a bit) on the matlab file exchange by Ken Garrard called plot3k that has this functionality that you're looking for. Mayhapes you could have a look at the implementation for hints for a gnuplot port.