Auto axis limits not working as expected

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.

[Stephen23]

" 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]

2019a