<jupyter_start><jupyter_text>grid search for the best Gaussian width<jupyter_code>#med = util.meddistance(tr.stack_xy())
#list_gwidth2 = (med*(2.0**np.linspace(-5, 5, 11)))**2
#tst.GammaMMDKGaussTest.grid_search_gwidth2(tr, list_gwidth2, alpha)<jupyter_output><empty_output>