Question

I’m creating a 2d MATLAB plot. I’m setting the limits of my x axis, and letting my y axis auto-adjust (by setting its limits to [-inf inf]). After creating my plot, I need to check what my y axis has auto adjusted to (as I’m going to create a heatmap to put under my plot).

Unfortunately, ylim (and similar functions) only produce [-inf inf], not whatever the axes have adjusted to.

Some code which reproduces this problem (much more simply than my actual code) is:

function createplot(xbounds)
x = xbounds(1):0.5:xbounds(2);
y = x.^2;
plot(x,y);
axis([xbounds,-inf,inf]);

createplot([0,10])

which produces a parabolic plot with y limits = [0,100]. However, ylim = [-inf, inf].

Any help would be appreciated!

/ Wilbur

Answer 1

As @Shai suggested, axis can give info regarding the ylimits without the need to set them to [-inf,inf] or use axis to set the x-axis bounds:

xbounds=[1 10]
x = xbounds(1):0.5:xbounds(2);
y = x.^2;
plot(x,y);
xlim([xbounds(1) xbounds(2)]);
v=axis 

v =
     1    10     0   100