scatterplot.py

transform.py

@@ -4,7 +4,6 @@
 # The functions in this module transform data. 
 # None of them are finished; this is your job!
 
-import sys
 
 def maximum(data):
     highest = None
@@ -49,8 +48,8 @@ def clamp(value, low, high):
         return high
 
 
-def ratio(value, start, end):
-    ratio = (value - start)/(end - start)
+def ratio(value, domain_min, domain_max):
+    ratio = (value - domain_min)/(domain_max - domain_min)
     return clamp(ratio,0,1)
 
 
@@ -61,12 +60,15 @@ def scale(value, domain_min, domain_max, range_min, range_max):
 
 
 def get_x_values(points):
-    for (x, y) in points:
-        return ([x], )
+    x_values=[]
+    for ([x, y]) in points:
+        x_values.append(x)
+    return x_values
     
 def get_y_values(points):
-    for (x, y) in points:
-        return ([y], )
-       
-    
+    y_values=[]
+    for ([x, y]) in points:
+        y_values.append(y)
+    return y_values
+