Update ECTResult class to manipulate ECT matrices efficiently

Author: yemeen

doc_source/ECTResult.md

@@ -1,6 +1,6 @@
 # ECTResult
 
-`ECTResult` class provides a fast way to calculate and plot items
+`ECTResult` class provides a fast way to manipulate ECT matrices while also maintaining properties of being a numpy array.
 
 
 ```{eval-rst}