.data2D.slope_2D" title="Link to this definition">¶</a></dt>
<dd><p>calculate slope maps in x and y.
return a couple of maps of type slope,x,y data for x and y slopes respectively.
Set scale to (dx,dy,1000.) for z in micron, x,y in mm. (?does it mean  1,1,1000?)</p>
</dd></dl>

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