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Conditionally colored line plot

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4.7 | 3 ratings Rate this file 8 Downloads (last 30 days) File Size: 3.76 KB File ID: #30423 Version:
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Conditionally colored line plot


Matt Tearle (view profile)


15 Feb 2011 (Updated )

Plots (2D line) graph split into two colors above and below a given threshold value

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Plots vectors x & y using one color for when y is greater than a given threshold value, and another color when y is less than the threshold.
You can optionally specify any standard formatting string that PLOT accepts (eg 'rx:' for a red dotted line with cross markers).

The plotting follows the standard MATLAB PLOT approach of linearly interpolating between data values. The coloring/linestyle changes at y = threshold, even on the interpolated line.


This file inspired Conditionally Colored Plot (Ccplot).

MATLAB release MATLAB 7.11 (R2010b)
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Comments and Ratings (3)
18 Jun 2016 Iliana Cardenes


Thank you for this function! :)

Is there a way to apply it when Y has more than one vector in it? So when every line exceeds a threshold then it changes the colour?

Another question, is there a way for the threshold to apply to the index in X and not the values in Y? So the threshold would appear vertically, not horizontally?

Thank you so much!


13 Mar 2014 Barnaby

Barnaby (view profile)

15 Jun 2012 Jeremy

Jeremy (view profile)

  • 1 file
  • 4.86667

It works well as described, but could be improved by handling multiple thresholds.

01 Sep 2016

Updated license

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