Remove thresholding example from user guide in favor of docstring example.

doc/examples/plot_otsu.py

@@ -1,23 +0,0 @@
-"""
-============
-Thresholding
-============
-
-Thresholding is used to create a binary image. This example uses Otsu's method to calculate the threshold value.
-
-"""
-
-import matplotlib.pyplot as plt
-
-from skimage.data import camera
-from skimage.thresholding import threshold_otsu
-
-
-image = camera()
-thresh = threshold_otsu(camera())
-binary = image > thresh
-
-plt.imshow(binary)
-plt.axis('off')
-plt.show()
-

skimage/thresholding/thresholding.py

@@ -24,6 +24,12 @@ def threshold_otsu(image, bins=256):
     ----------
     .. [1] Wikipedia, http://en.wikipedia.org/wiki/Otsu's_Method
 
+    Examples
+    --------
+    >>> from skimage.data import camera
+    >>> image = camera()
+    >>> thresh = threshold_otsu(camera())
+    >>> binary = image > thresh
     """
     hist, bin_centers = histogram(image, bins)
     hist = hist.astype(float)