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function [XLim,XLimMode,YLim,YLimMode]=_ratio_one_lims(ax)
XLimMode=ax.user_data.XLimMode;
YLimMode=ax.user_data.YLimMode;
XLim=ax.user_data.XLim;
YLim=ax.user_data.YLim;
if XLimMode=='manual' & YLimMode=='manual'
return
end
if XLimMode=='auto'
dx=ax.user_data.data_bounds(2)-ax.user_data.data_bounds(1);
XLim=ax.user_data.data_bounds(1:2);
else
dx=ax.user_data.XLim(2)-ax.user_data.XLim(1);
XLim=ax.user_data.XLim;
end
if YLimMode=='auto'
YLim=ax.user_data.data_bounds(3:4);
dy=ax.user_data.data_bounds(4)-ax.user_data.data_bounds(3);
else
dy=ax.user_data.YLim(2)-ax.user_data.YLim(1);
YLim=ax.user_data.YLim;
end
if dx==0
data_ratio=%inf;
else
data_ratio=dy/dx;
end
axes_screen_ratio=ax.parent.axes_size(2)*ax.axes_bounds(4)/ax.parent.axes_size(1)/ax.axes_bounds(3);
if (data_ratio>=axes_screen_ratio & XLimMode=='auto') | (XLimMode=='auto' & YLimMode=='manual')
w=dy/axes_screen_ratio
XLim=mean(ax.user_data.data_bounds(1:2))+[-w/2 w/2];
else
_h=dx*axes_screen_ratio
YLim=mean(ax.user_data.data_bounds(3:4))+[-_h/2 _h/2];
end
endfunction
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