y a 3D transformation (from Nx3 to Nx3) to data.</p>
<p>TODO: add option to set final resampling grid keeping initial sampling, 
initial number of points or on custom grid (use points.resample_grid, resample_data).</p>
</dd></dl>

<dl class="py function">
<dt class="sig sig-object py" id="pySurf.data2D.calculate_slope_2D">
<span class="sig-prename descclassname"><span class="pre">pySurf.data2D.</span></span><span class="sig-name descname"><span class="pre">calculate_slope_2D</span></span><span class="sig-pa