From 0c5e75b42fb02faa2f2735aa4e188d32b9691101 Mon Sep 17 00:00:00 2001
From: Zachary Sloan
Date: Thu, 20 Jun 2013 21:47:59 +0000
Subject: Added file corr_result_helpers.py that includes the function that
 normalizes the lists of sample values

---
 wqflask/utility/corr_result_helpers.py | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 wqflask/utility/corr_result_helpers.py

(limited to 'wqflask/utility')

diff --git a/wqflask/utility/corr_result_helpers.py b/wqflask/utility/corr_result_helpers.py
new file mode 100644
index 00000000..edf32449
--- /dev/null
+++ b/wqflask/utility/corr_result_helpers.py
@@ -0,0 +1,30 @@
+def normalize_values(a_values, b_values):
+    """
+    Trim two lists of values to contain only the values they both share
+    
+    Given two lists of sample values, trim each list so that it contains
+    only the samples that contain a value in both lists. Also returns
+    the number of such samples.
+    
+    >>> normalize_values([2.3, None, None, 3.2, 4.1, 5], [3.4, 7.2, 1.3, None, 6.2, 4.1])
+    ([2.3, 4.1, 5], [3.4, 6.2, 4.1], 3)
+    
+    """
+    
+    min_length = min(len(a_values), len(b_values))
+    a_new = []
+    b_new = []
+    for counter in range(min_length):
+        if a_values[counter] and b_values[counter]:
+            a_new.append(a_values[counter])
+            b_new.append(b_values[counter])
+        
+    num_overlap = len(a_new)
+    assert num_overlap == len(b_new), "Lengths should be the same"
+    
+    return a_new, b_new, num_overlap
+
+
+if __name__ == '__main__':
+    import doctest
+    doctest.testmod()
\ No newline at end of file
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