Matlab更新子图并保持 [英] Matlab updating subplots and hold on

问题描述

我在更新子图时遇到麻烦.我将问题归结为以下示例:

I am having trouble with updating subplots. I've boiled my problem down to the following example:

win = figure(1);
win.sub1 = subplot(2, 2, 1);
win.sub2 = subplot(2, 2, 2);
win.sub3 = subplot(2, 2, 3);
win.sub4 = subplot(2, 2, 4);

x = 1:1:10;

plot(win.sub2, x, x); %graphs the line y = x in the second subplot, good.
hold on;
plot(win.sub2, x, -x) %ought to plot line y = -x over line y = x, but does not.

执行第二个绘图时，尽管保持按住状态，第一个绘图仍会消失.看起来唯一可行的方法是使用axes(win.sub2)，但我试图避免这种情况，因为这确实减慢了我的程序的速度(在一个图形上绘制4个子图，每个子图都有大约2个重叠的图，以创建1000帧以上的影片).感谢您的协助.谢谢

When executing the second plot, the first plot disappears despite the hold on. The only thing that seems to make this work is if I use axes(win.sub2), but I'm trying to avoid that because it really slows down my program (plotting 4 subgraphs on one figure, each with about 2 overlaid plots, to create a 1000+ frame movie). I appreciate any assistance. Thanks

推荐答案

为什么您的示例无法按预期运行，但将hold on;更改为hold(win.sub2, 'on');似乎会产生预期的结果，我感到有些困惑.

I am a bit puzzled why your example does not work as expected, but changing hold on; to hold(win.sub2, 'on'); seems to produce the desired result.

注意:在执行示例代码时，matlab会向我发出警告，可能是因为第二行覆盖了第一行中定义的win.

Note: when executing your example code, matlab gives me a warning, probably because the second line overwrites win as defined in the first line.

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