How to adjust colors of animated plot3 over time

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Hans van der Horn
Hans van der Horn 2020-2-17
评论： darova 2020-2-20
Hi,
I would like to change colors over time in an animated plot.
The way I do it right now is to run a loop over the datapoints and taking a color from a char array called colors.
tstep = .1
figure(1)
for n = 1:length(x)
plot3(x(1:n),y(1:n),z(1:n), 'LineWidth', 1, 'Color', colors(n))
pause(.05)
Image = getframe(gcf);
im = frame2im(Image);
end
However, this will change the color of the entire line in case of a change in color, while I would like the previous points to say the color they were.
How could I fix this?
Thanks so much,
Best
Hans

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回答（1 个）

darova
darova 2020-2-17
Try this
n = 100;
colors = jet(100);
x = linspace(0,10,n);
y = sin(x);
cla
xlim([min(x) max(x)])
ylim([min(y) max(y)])
hold on
for i = 1:n-1
plot(x(i:i+1),y(i:i+1),'color',colors(i,:))
pause(0.1)
end
hold off
  2 个评论
Hans van der Horn
Hans van der Horn 2020-2-20
Thanks so much! I works for a 2D plot, but I don't think it works for a 3D (x, y, z) plot using plot3.

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