multiple colours in a trajectory plot

22 views (last 30 days)
I have a time series X, which I can plot in x-y plane.
plot(X(:,1), X(:,2), 'r.')
This gives a red dot colour. What I want to do is I want to make this graph such that the colour represents the colour of the rainbow. (Red at the start, violet in the end) This is so we can give a time sense of the trajectory.
How do we do this?

Accepted Answer

Star Strider
Star Strider on 10 Apr 2018
Edited: Star Strider on 11 Apr 2018
Try this:
X = [(0:50)' sin((0:50)*pi/10)']; % Create ‘X’
cm = colormap(jet); % Approximates Spectrum
X(end,2) = NaN; % Set Last Value To ‘NaN’ To Create Line
c = flipud(X(:,1)); % Define Colours To Scale With ‘X(:,1)’
patch(X(:,1), X(:,2), c, 'EdgeColor','interp')
EDIT Added plot image.
Walter Roberson
Walter Roberson on 17 Jan 2021
%flip the current colormap
or for fixed colormap

Sign in to comment.

More Answers (1)

Walter Roberson
Walter Roberson on 10 Apr 2018
It is not possible to have multiple colors on a line create by a single call to plot() or the underlying function line() .
You can look in the File Exchange for a couple of contributions for drawing colored lines. One of them uses surface objects, and one of them uses patch objects.


Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by