Auto axis limits not working as expected

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Andrew Haselgrove 2019-5-30

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https://ww2.mathworks.cn/matlabcentral/answers/464720-auto-axis-limits-not-working-as-expected

评论： Andrew Haselgrove 2019-5-30

I have a graph for which I want to limit the y axis to be positive. Research suggested to me the way to do this was ylim([0, inf]). However, rather than giving a 'nice' upper limit (like the default does), this command just sets the upper limit to the maximum value in my dataset. Is there a way to achieve what I am after? The best I have found is

yl = ylim()
ylim(0, yl(2))

but this doesn't allow the upper limit to continue updating if additional plots were included.

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Stephen23 2019-5-30

编辑：Stephen23 2019-5-30

" Is there a way to achieve what I am after?"

Not easily, as far as I am aware. I think this behavior should be reported as a bug: it is quite reasonable to expect that the Inf limit should produce the same as the auto limits.

What MATLAB version are you using?

Andrew Haselgrove 2019-5-30