From 49d6eef95d73d7c521e33301aff98043154290a9 Mon Sep 17 00:00:00 2001
From: Michael Scholz <m.scholz88@googlemail.com>
Date: Mon, 10 Jun 2013 10:53:44 +0200
Subject: [PATCH] web mining update

---
 .../Uebungen/4_Uebung/code/naive_bayes.py     |  64 ++++++++++++------
 .../Uebungen/4_Uebung/solution.odt            | Bin 0 -> 9576 bytes
 2 files changed, 44 insertions(+), 20 deletions(-)
 create mode 100644 ss2013/1_Web Mining/Uebungen/4_Uebung/solution.odt

diff --git a/ss2013/1_Web Mining/Uebungen/4_Uebung/code/naive_bayes.py b/ss2013/1_Web Mining/Uebungen/4_Uebung/code/naive_bayes.py
index ecce396d..eae3e971 100644
--- a/ss2013/1_Web Mining/Uebungen/4_Uebung/code/naive_bayes.py	
+++ b/ss2013/1_Web Mining/Uebungen/4_Uebung/code/naive_bayes.py	
@@ -6,6 +6,7 @@ import random
 
 
 
+
 # config variables
 actualDir = os.path.dirname(os.path.realpath(__file__))
 dataDir   = os.path.join(actualDir, '../data')
@@ -23,18 +24,10 @@ class trainingsset:
     
     #def __init__(self):
     
-    classes = ['adventure', 'belles_lettres', 'editorial', 'fiction', 'government', 'hobbies', 'learned', 'lore','mystery','news','romantic']
     
     def createTrainingsset(self):
         self.splitTrainingsdataRandomly(self) # first split our data into trainings- and testdata
-        
-    
-    def getClassesToTrain(self):
-        for dirpath, dirnames, filenames in os.walk(trainDir):
-            # TODO: implement
-            pass
-            
-            
+                        
         
     # copies files randomly to new directories. Each directory will contain fileCount / 2 numbers of files
     # If fileCount is uneven /trainingsdata will contain one file more than /testdata
@@ -82,8 +75,9 @@ class trainingsset:
 '''
 class multiclassClassifier:
         
-        filesToPrediction = {};
-        testFiles = {}
+
+        termfrequenciesOfClasses = {};
+        countClass = {}
         
         
         def writePredictionFile(self):
@@ -93,13 +87,43 @@ class multiclassClassifier:
             f.closed
             return
         
-        # reads all testData from /u4_train to the list 
-        def getTestData(self):
-            listing = os.listdir(testDir)                
-            for infile in listing:
-                f = open(testDir+'/'+infile, 'r')
-                self.testFiles[infile] = f.readline()
-                f.close()
+        # calculates all necessary stuff for multiclass classifier
+        def getTermfrequenciesOfClasses(self):
+            listing = os.listdir(trainDir)              
+            for classes in listing: # classes
+                self.termfrequenciesOfClasses[classes] = {}
+            for classes in self.termfrequenciesOfClasses.keys():
+                currentPath = trainDir+'/'+classes+'/trainingsdata'
+                listing = os.listdir(currentPath)  
+                for infile in listing:
+                    if self.countClass.has_key(classes):
+                        self.countClass[classes] += 1
+                    else:
+                        self.countClass[classes] = 1
+                    currentPath = trainDir+'/'+classes+'/trainingsdata/'+infile 
+                    # update termfrequency for specific class:
+                    self.termfrequenciesOfClasses[classes] = self.updateDictonary(currentPath, self.termfrequenciesOfClasses[classes])
+                    
+                    
+                                    
+        # "incudludes" a file into the termfrequency dictonary
+        def updateDictonary(self, pathToFile, dictonary):
+            f = open(pathToFile, 'r')
+            lines = f.readlines();
+            for line in lines:
+                thisline = line.split(" ");
+                for word in thisline:
+                    word = word.lower()
+                    word = word.replace(".", " ")
+                    word = word.replace(",", " ")
+                    if dictonary.has_key(word):
+                        dictonary[str(word)] += 1
+                    else:
+                        dictonary[str(word)] = 1    
+            f.close()
+            return dictonary
+                
+                
         
         
         def bayes(self, listOfFiles):
@@ -119,10 +143,10 @@ class multiclassClassifier:
 if __name__ == '__main__':
     ts = trainingsset()
     #ts.splitTrainingsdataRandomly();
-    ts.getClassesToTrain();
+    #ts.getClassesToTrain();
     
     mc = multiclassClassifier()
-    #mc.getTestData()
+    mc.getTermfrequenciesOfClasses()
     #mc.writePredictionFile()
     
     
diff --git a/ss2013/1_Web Mining/Uebungen/4_Uebung/solution.odt b/ss2013/1_Web Mining/Uebungen/4_Uebung/solution.odt
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