How to make the label inside of the figure box

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MathWorks Support Team
回答： MathWorks Support Team 2018-6-4
Why does the xlabel command add the label outside of the figure box and changing the 'OuterPosition' and 'InnerPosition' properties does't work?
The following will reproduce the issue:
Starting with a figure containing an x-y plot, add a second set of axes using
ax1=gca;
ax1_pos = ax1.Position; % position of first axes
ax2 = axes('Position',ax1_pos,...
'XAxisLocation','top',...
'Color','none');
change the second x-axis limits, then add a label
xlim([0.1 1.1]);
xlabel('Outer diameter, in');
See that the label is outside of the figure box. Also, changing 'OuterPosition' and 'InnerPosition' properties does't do anything

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采纳的回答

MathWorks Support Team
When set the labels, MATLAB will rescale the axes to fit the labels onto the figure. However, when set the position of 'ax2', that position will take precedence over any rescaling that MATLAB usually does and this is why the label was out of the figure box.
To avoid this issue, first set the 'xlabel' for 'ax2' to scale appropriately and then call:
>> ax2_pos = ax2.Position;
>> ax1.Position = ax2_pos;

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