x and y. Return the three axis.
Set scale to (1,1,1000.) for z in micron, x,y in mm.
If filter is set, data out of srange are removed and automatic scale is
used for plot. If not, srange is used for plot axis, but all data
are used in plots and rms calculation.</p>
</dd></dl>

<dl class="py function">
<dt class="sig sig-object py" id="pySurf.data2D.plot_slope_slice">
<span class="sig-prename descclassname"><span class="pre">pySurf.data2D.</span></span><span class="sig-name descname"><span class="pre">plot_s