MNT: tweaks to x-ray examples

Author: tacaswell

05-spectral/spectral.py

@@ -75,3 +75,7 @@ def update(lo, hi):
 
 ret = plot_all_chan_spectrum(spectrum, bins)
 plt.show()
+
+
+# Exercise (15 minutes)
+# - add span selector to top axes to change curve in right axes

06-xrf/xrf_interact.py

@@ -152,7 +152,7 @@ def _pixel_select(self, event):
         x, y = event.xdata, event.ydata
         # get index by assuming even spacing
         # TODO use kdtree?
-        diff = np.hypot((self.x_pos - x),  (self.y_pos - y))
+        diff = np.hypot((self.x_pos - x), (self.y_pos - y))
         y_ind, x_ind = np.unravel_index(np.argmin(diff), diff.shape)
 
         # get the spectrum for this point