Miguel Barão / aprendizations

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Commit 7e984525c9fd745a6b3da054df48469ed0420d62

Authored by Miguel Barão
1 parent 5d859a41
Exists in master and in 1 other branch dev

fix forgetting factor (was hardcoded)

Showing 2 changed files with 8 additions and 6 deletions   Show diff stats
aprendizations/student.py
  Diff comments   View file @7e98452
... ... @@ -12,11 +12,12 @@ logger = logging.getLogger(__name__)
12 12  
13 13  
14 14 # ----------------------------------------------------------------------------
15   -# kowledge state of each student....??
  15 +# kowledge state of a student
16 16 # Contains:
17   -# state - dict of topics with state of unlocked topics
  17 +# state - dict of unlocked topics and their levels
18 18 # deps - access to dependency graph shared between students
19   -# topic_sequence - list with the order of recommended topics
  19 +# topic_sequence - list with the recommended topic sequence
  20 +# current_topic - nameref of the current topic
20 21 # ----------------------------------------------------------------------------
21 22 class StudentState(object):
22 23 # =======================================================================
... ... @@ -34,13 +35,13 @@ class StudentState(object):
34 35  
35 36 # ------------------------------------------------------------------------
36 37 # Updates the proficiency levels of the topics, with forgetting factor
37   - # FIXME no dependencies are considered yet...
38 38 # ------------------------------------------------------------------------
39 39 def update_topic_levels(self):
40 40 now = datetime.now()
41 41 for tref, s in self.state.items():
42 42 dt = now - s['date']
43   - s['level'] *= 0.98 ** dt.days # forgetting factor
  43 + forgetting_factor = self.deps.node[tref]['forgetting_factor']
  44 + s['level'] *= forgetting_factor ** dt.days # forgetting factor
44 45  
45 46 # ------------------------------------------------------------------------
46 47 # Unlock topics whose dependencies are satisfied (> min_level)
... ...
demo/demo.yaml
  Diff comments   View file @7e98452
... ... @@ -4,7 +4,7 @@ title: Example
4 4 database: students.db
5 5  
6 6  
7   -# values applie to each topic, if undefined there
  7 +# values applied to each topic, if undefined there
8 8 file: questions.yaml
9 9 shuffle_questions: true
10 10 choose: 6
... ... @@ -27,3 +27,4 @@ topics:
27 27 name: Sistema solar
28 28 deps:
29 29 - math
  30 + forgetting_factor: 0.1
... ...