Draw Plot spectra with gradient color by intensities

Hy!

I attemp to color a Y/X vector plot with a gradient color associated to Y variable that had negative or positive values. I would to create this plot with related colorbar legend in the same figure.

Can you suggest me ?

Many Thanks Riccardo

Answer 1

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/21382-plot-different-color

http://www.mathworks.com/matlabcentral/answers/10017-colormap-and-plot-with-nxn-matrices