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courses:be5b33prg:homeworks:spam:step3 [2015/11/25 16:34]
xposik [Spam filter - step 3] 		courses:be5b33prg:homeworks:spam:step3 [2015/12/14 14:24] (current)
xposik [Function ''quality_score()'']
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 Task: Task:
   * Create function ''​quality_score(tp,​ tn, fp, fn)''​ in module ''​quality.py''​.   * Create function ''​quality_score(tp,​ tn, fp, fn)''​ in module ''​quality.py''​.
-  * Function computes the quality score defined during the lab.+  * Function computes the quality score defined during the lab (find it also [[courses:​be5b33prg:​homeworks:​spam:​evaluation#​filter_quality_assessment|here]]).
  
 ^ ''​quality_score(tp,​ tn, fp, fn) ''​ Compute the quality score based on the confusion matrix. ^^ ^ ''​quality_score(tp,​ tn, fp, fn) ''​ Compute the quality score based on the confusion matrix. ^^
-^ Inputs | A 4-tuple of values ​TP, TN, FP, FN. |+^ Inputs | 4 nonnegative integers for TP, TN, FP, FN. |
 ^ Outputs | A number between 0 and 1 showing the prediction quality measure. | ^ Outputs | A number between 0 and 1 showing the prediction quality measure. |
  
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   * In module ''​quality.py'',​ create function ''​compute_quality_for_corpus(corpus_dir)''​ which evaluates the filter quality based on the information contained in files ''​!truth.txt''​ and ''​!prediction.txt''​ in the given corpus.   * In module ''​quality.py'',​ create function ''​compute_quality_for_corpus(corpus_dir)''​ which evaluates the filter quality based on the information contained in files ''​!truth.txt''​ and ''​!prediction.txt''​ in the given corpus.
   * The true and predicted classification can be read in the form of dictionaries using function ''​read_classification_from_file()''​.   * The true and predicted classification can be read in the form of dictionaries using function ''​read_classification_from_file()''​.
-  * The confusion matrix for the given corpus can be computed from the dictionaries using method ''​compute_from_dicts()'' ​of ''​BinaryConfusionMatrix''​ class.+  * The confusion matrix for the given corpus can be computed from the dictionaries using method ''​compute_confusion_matrix()'' ​function from step 2.
   * The quality score can be computed from the confusion matrix using function ''​quality_score()''​.   * The quality score can be computed from the confusion matrix using function ''​quality_score()''​.
  
courses/be5b33prg/homeworks/spam/step3.1448465661.txt.gz · Last modified: 2015/11/25 16:34 by xposik