From 187ef9e49088d89a41a5c242c6e29a8c09a71b33 Mon Sep 17 00:00:00 2001
From: Calvin <calvin@EESI>
Date: Tue, 19 Mar 2013 16:37:40 -0400
Subject: working on feast ctypes

---
 python/demo_feast_wrapper.py |  8 +++-----
 python/feast.py              | 25 +++++++++++++++++++++++++
 2 files changed, 28 insertions(+), 5 deletions(-)
 create mode 100644 python/feast.py

diff --git a/python/demo_feast_wrapper.py b/python/demo_feast_wrapper.py
index 0913788..6642ca8 100644
--- a/python/demo_feast_wrapper.py
+++ b/python/demo_feast_wrapper.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python 
-
+import feast
 import numpy as np
 
 ##################################################################
@@ -34,7 +34,7 @@ data, labels = read_digits('digit.txt')
 n_observations = len(data)					# number of samples in the data set
 n_features = len(data.transpose())	# number of features in the data set
 n_select = 15												# how many features to select
-method = 'jmi'											# feature selection algorithm
+method = 'JMI'											# feature selection algorithm
 
 
 print '---> Information'
@@ -43,7 +43,5 @@ print '     :n_features     - ' + str(n_features)
 print '     :n_select       - ' + str(n_select)
 print '     :algorithm      - ' + str(method)
 
+selected_features = feast.select(data, labels, n_observations, n_features, n_select, method)
 
-# Calvin: feature selection wrapper goes here
-#selected_features = feast(data, labels, n_observations, n_features, n_select, \
-#	method)
\ No newline at end of file
diff --git a/python/feast.py b/python/feast.py
new file mode 100644
index 0000000..bc6fc93
--- /dev/null
+++ b/python/feast.py
@@ -0,0 +1,25 @@
+import numpy as np
+from ctypes import * 
+
+def select(data, labels, n_observations, n_features, n_select, method):
+  
+  selected_features = []
+
+  try:
+    libFSToolbox = CDLL("libFSToolbox.so"); 
+  except:
+    print "Error: could not find libFSToolbox"
+    exit()
+
+# JMI(n_features_to_ret, int n_samples, int n_feats, double *featureMatrix, double *classcol, outputFeatures);
+  c_output = (c_double * n_select)
+  c_n_observations = c_int(n_observations)
+  c_n_select = c_int(n_select)
+  c_n_features = c_int(n_features)
+  c_data = (c_double * n_observations * n_features)(*data.tolist())
+  c_labels = (c_int * len(labels))(*labels)
+
+  # right now just call only JMI, work out the rest later
+  libFSToolbox.JMI(c_n_select, c_n_observations, c_n_features, c_data, c_labels, c_output)
+
+  return selected_features
-- 
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