Animation Slow Due to ColorBar.doUpdate Function

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Joshua Robinson 2019-5-22

1
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/463526-animation-slow-due-to-colorbar-doupdate-function

评论： Arno van der Heijden 2020-2-17

I'm trying to animate a plot with a static colorbar on it.

For some reason a large percentage of my code runtime is spent in this ColorBar.doUpdate function, despite the fact that I am not manually changing any colorbar properties as the code runs.

Is there a way to force Matlab to keep the properties of the colobar static (and not even attempt to update the colorbar) even as the graph limits are updated?

Here is an example that mimics the issue I am seeing.

clear all
close all
% params
R = 10;
dtheta = deg2rad(1);
max_theta = 3*(2*pi);
% initalize figure
figure;
% xlim(1.5*R*[-1 1]); % static limits
% ylim(1.5*R*[-1 1]);
grid('on');
colorbar;
colormap('jet');
% main loop
rect = rectangle;
for theta=0:dtheta:max_theta
    x = R*cos(theta);
    y = R*sin(theta);
    pos = [x y 1 1];
    rect.Position = pos;
    xlim(1.5*R*[-1 1]); % dynamic limits
    ylim(1.5*R*[-1 1]);
    
    drawnow;
    
end