Fixes

DIP2-cheatsheet.md

@@ -131,13 +131,13 @@ def log_transformation(img):
 ```
 
 ## Plotting
-Importing
+### Setup
 ```python
 from matplotlib import pyplot as plt
 # set up plot
 ...
 plt.title=("Title")
-plt.xlabel=("X-axis")
+plt.xlabel=("x_label")
 plt.ylabel=("y_label")
 plt.show()
 ```