Efficiently setting lower axis limit

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Omar Mian
Omar Mian 2012-4-12
回答： Lucademicus 2019-1-23
I would like to set the lower axis limit and leave the upper limit at the auto value (rather than specifcy the upper limit myself). At the moment I do this to set the lower limit at zero:
xlim_curr = get(gca,'xlim');
xlim_curr(1) = 0;
set(gca,'xlim',xlim_curr)
Is it possible to do this with a single line of code?
Thanks

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采纳的回答

Jan
Jan 2012-4-12
One line:
set(gca, 'XLim', [0, get(gca, 'XLim') * [0; 1]])
Or without assuming that the lower limit is 0:
set(gca, 'XLim', get(gca, 'XLim') .* [0, 1] + [lowLimit, 0])
But your three lines are easier to read and faster to debug.

更多回答（3 个）

onewhaleid
onewhaleid 2018-1-2
编辑：onewhaleid 2018-1-2
I use the xlim function. When called with no arguments, it returns the current limits:
xlim([0, max(xlim)])
Matt Kindig
Matt Kindig 2012-4-12
You could do it in two lines:
xlim_curr = get(gca,'xlim');
set(gca, 'xlim', [0 xlim_curr(2)]);
I've tried to do exactly this before (fix one axis limit and allow the other to auto-scale), and could not figure out a better way.
Lucademicus
Lucademicus 2019-1-23
From the documentation of r2018b:
'Create a surface plot and show only y values greater than 0. Specify the minimum y-axis limit as 0 and let MATLAB choose the maximum limit.'
[X,Y,Z] = peaks;
surf(X,Y,Z)
ylim([0 inf])

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