Update check_points.m

scripts/check_points.m

-function [ nw, on] = check_points( x, a,b , isvertical)
+function [ northWest, on] = check_points( x, a,b , isVertical)
 %check_points Determines which of a number of 2D points in x lie north (west)
 % of the line ax + b and if any points lie on the line
 %   If the line is vertical, the constant x-value goes in the input a
 
-if isvertical
-    nw = x(:,1) < a;
-    on = x(:,1) == a;
+if isVertical
+    northWest   = x(:,1) < a;
+    on          = x(:,1) == a;
 elseif a == 0
-    nw = x(:,2) > b;
-    on = x(:,2) == b;
+    northWest   = x(:,2) > b;
+    on          = x(:,2) == b;
 else 
-    nw = a*x(:,1) + b < x(:,2);
-    on = a*x(:,1) + b == x(:,2);
+    northWest   = a*x(:,1) + b < x(:,2);
+    on          = a*x(:,1) + b == x(:,2);
 end
 
 end