Update descriptions for images_contours_and_fields

Author: divyam3897

examples/images_contours_and_fields/griddata_demo.py

@@ -3,6 +3,7 @@
 Griddata Demo
 =============
 
+Example showing plotting of non uniform data points in the form of grid.
 """
 from matplotlib.mlab import griddata
 import matplotlib.pyplot as plt

examples/images_contours_and_fields/shading_example.py

@@ -3,18 +3,17 @@
 Shading Example
 ===============
 
+Example showing how to make shaded relief plots
+like Mathematica
+(http://reference.wolfram.com/mathematica/ref/ReliefPlot.html)
+or Generic Mapping Tools
+(http://gmt.soest.hawaii.edu/gmt/doc/gmt/html/GMT_Docs/node145.html)
 """
 import numpy as np
 import matplotlib.pyplot as plt
 from matplotlib.colors import LightSource
 from matplotlib.cbook import get_sample_data
 
-# Example showing how to make shaded relief plots
-# like Mathematica
-# (http://reference.wolfram.com/mathematica/ref/ReliefPlot.html)
-# or Generic Mapping Tools
-# (http://gmt.soest.hawaii.edu/gmt/doc/gmt/html/GMT_Docs/node145.html)
-
 
 def main():
     # Test data