Animated Line: display different colours and leave the colourful trail

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Butterflyfish
Butterflyfish 2020-4-15
评论： Adam Danz 2020-4-15
I have a trajectory which I would like to animate with the colour changing depending on a condition. Here is my script so far:
h = animatedline('MaximumNumPoints', 1000);
axis([0, 384, -402, 0])
h.Marker='.';
for k = 1: length(trajectories.pos_x)
if ismember(k, freezing_time)
h.Color = 'g';
addpoints(h,trajectories.pos_x(k),-trajectories.pos_y(k))
elseif ismember(k, swim_time)
h.Color = 'y';
addpoints(h,trajectories.pos_x(k),-trajectories.pos_y(k))
elseif ismember(k, fast_time)
h.Color = 'r';
addpoints(h,trajectories.pos_x(k),-trajectories.pos_y(k))
end
drawnow
end
The problem is that the whole line is changing colour at each marker (when needed) and the 'trail' doesn't hold the original colours. For example, when hitting a coordinates with condition 1, the whole line goes green, where I would only want that coordinate point to go green.
Many thanks for any help!
  1 个评论
Adam Danz
Adam Danz 2020-4-15
You probably can't use animatedLine if you want each line segement to have its own color.
Instead, you can plot each segment as a new line using
hold on % only once
plot([x0,x1],[y0,y1], '-','color', 'g')

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