multiple colours in a trajectory plot
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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?
采纳的回答
Star Strider
2018-4-10
编辑：Star Strider
2018-4-11
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)’
figure
patch(X(:,1), X(:,2), c, 'EdgeColor','interp')
EDIT — Added plot image.
6 个评论
CLARK KENDRICK GO
2018-4-12
Walter Roberson
2018-4-12
You can
pointsize = 15;
scatter(X(:,1), X(:,2), pointsize, (1:size(X,1)).', '.');
colormap(jet)
Star Strider
2018-4-12
@Walter — Thanks
Niklas Kurz
2021-1-17
Again just coming in clutch!
Niklas Kurz
2021-1-17
Would also be worth knowing how to apply the color map upside down, with other words going up the y-axis
Walter Roberson
2021-1-17
%flip the current colormap
colormap(flipud(colormap))
or for fixed colormap
colormap(flipud(jet))
更多回答（1 个）
Walter Roberson
2018-4-10
0 个投票
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.
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