linkaxes(ax,'x') + candle() + automatic adjustment of y limits of subplots

Question

Herwig Peters 2012-10-20

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https://ww2.mathworks.cn/matlabcentral/answers/51392-linkaxes-ax-x-candle-automatic-adjustment-of-y-limits-of-subplots

评论： Herwig Peters 2017-7-4

I have a figure with two subplots, which share the same x range but have very different y ranges. I link the x axes with linkaxes(ax,'x'). If I zoom in on, say, the second subplot, the x limits on both plots are changed simultaneously. However, the y limits on the first plot are too wide now, hence I'd like Matlab to do an automatic adjustment/zoom of the y limits for the first subplot. I'd use

linkaxes(ax,'x')
set(ax,'ylimmode','auto')

and the ylims should be reset automatically every time I zoom in on any subplot. But... Matlab doesn't adjust YLim correctly. How can I fix this?

EDIT: In one of the subplots, I call the function candle(). This seems to cause the problems. When I replace candle() by plot(), everything is ok. How to make this work with candle()?

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Answer 1

Azzi Abdelmalek 2012-10-20

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https://ww2.mathworks.cn/matlabcentral/answers/51392-linkaxes-ax-x-candle-automatic-adjustment-of-y-limits-of-subplots#answer_62649

在 MATLAB Online 中打开

 x=0:0.1:10;
 ax(1)=subplot(2,1,1);
 ax(2)=subplot(2,1,2);
 plot(ax(1),t,sin(2*t))
 plot(ax(2),t,2*sin(t))
 linkaxes(ax,'x')

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Azzi Abdelmalek 2012-10-20

why don't you post your code?

Herwig Peters 2012-10-20

在 MATLAB Online 中打开

Ok, I've created a small example. Try zooming in on the second plot around x=500.

clear ax
n = 1000;
P.trend = [linspace(1,8,n/2)';linspace(8,2,n/2)'];
P.high = P.trend+rand(n,1);
P.low = P.trend+rand(n,1);
P.close = P.trend+rand(n,1);
P.open = P.trend+rand(n,1);
I.trend = linspace(7,3,n)';
I.high = I.trend+rand(n,1);
I.low = I.trend+rand(n,1);
I.close = I.trend+rand(n,1);
I.open = I.trend+rand(n,1);
ax(1) = subplot(2,1,1);
candle(P.high,P.low,P.close,P.open)
ax(2) = subplot(2,1,2);
candle(I.high,I.low,I.close,I.open)
linkaxes(ax,'x')
set(ax,'ylimmode','auto')