determine axis limits *before* plotting..?

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Hi everyone,
I need to determine the y-axis limits "before" rendering my plot, b/c the elements are rendered in a loop, one at a time. xlim() isn't any use in this case. Will I have to reverse-engineer MATLAB's algorithm, or is there another approach?
Thanks, Brad
Oleg Komarov
Oleg Komarov on 9 Sep 2012
I think we might help you if you posted the code.

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Accepted Answer

Jan on 9 Sep 2012
Edited: Jan on 10 Sep 2012
Yair has explained some tricks to You can set the XLimMode of the current axes to 'fixed' and let Matlab determine the limits at the end only by resetting it to 'auto'.
[EDITED, link fixed, thanks Yair]
Bradley Stiritz
Bradley Stiritz on 10 Sep 2012
Yair, thanks for the very helpful blog postings. Your work is greatly appreciated, as always!

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More Answers (1)

Image Analyst
Image Analyst on 9 Sep 2012
You can save the y and x limits for the current axes at any time by using the ylim and xlim functions:
% Save initial limits.
initial_ylim_values = ylim();
initial_xlim_values = xlim();
% Now plot something that will change the ylimits
plot(x, y); % Some y that will change the y limits.
after_ylim_values = ylim();
after_xlim_values = xlim();
Image Analyst
Image Analyst on 9 Sep 2012
Then you need to set "hold on" and MATLAB will "lock down" all those settings and not allow subsequent plots to change them.

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