[feat] add README.md for load_data.py

scripts/AKT/README.md

@@ -0,0 +1,70 @@
+## AKT load_data.py
+
+This script is used for loading data from a txt file.
+
+### Data Format
+
+The data format in txt file could be:
+
+1. without problem_id
+    ```
+    seqlen
+    question_id_1,question_id_2,question_id_3
+    answer_1, answer_2, answer_3
+    ```
+   for example:
+   ```
+   7
+   83,83,83,83,20,84,19
+   0,1,1,1,1,1,1
+   ```
+   
+2. with problem_id
+   ```
+   seqlen
+   problem_id_1,problem_id_2,problem_id_3
+   question_id_1,question_id_2,question_id_3
+   answer_1, answer_2, answer_3
+   ```
+   for example:
+   ```
+   7
+   13060,12972,13087,13057,3758,13366,3605
+   83,83,83,83,20,84,19
+   0,1,1,1,1,1,1
+   ```
+   
+It will be translated to following format:
+```python
+# without problem_id
+tuple(question_array, question_answer_array, student_id_array)
+question_array: np_array(np_array, np_array, ...)
+question_answer_array: np_array(np_array, np_array, ...)
+student_id_array: np_array(1, 2, ...)
+
+# with problem_id
+tuple(question_array, question_answer_array, problem_array)
+question_array: np_array(np_array, np_array, ...)
+question_answer_array: np_array(np_array, np_array, ...)
+problem_array: np_array(np_array, np_array, ...)
+```
+
+### Usage
+
+```python
+from scripts.AKT import DATA, PID_DATA
+
+model_type = 'pid'
+n_question = 123
+n_pid = 17751
+seqlen = 200
+
+if model_type == 'pid':
+    dat = PID_DATA(n_question=n_question, seqlen=seqlen, separate_char=',')
+else:
+    dat = DATA(n_question=n_question, seqlen=seqlen, separate_char=',')
+
+train_data = dat.load_data('../../data/2009_skill_builder_data_corrected/train_pid.txt')
+
+q, qa, p = train_data
+```

scripts/AKT/load_data.py

@@ -10,7 +10,7 @@ def __init__(self, n_question, seqlen, separate_char):
         self.seqlen = seqlen
 
     # data format
-    # id, true_student_id
+    # length
     # 1,1,1,1,7,7,9,10,10,10,10,11,11,45,54
     # 0,1,1,1,1,1,0,0,1,1,1,1,1,0,0
 
@@ -85,7 +85,7 @@ def __init__(self, n_question, seqlen, separate_char):
         self.n_question = n_question
 
     # data format
-    # id, true_student_id
+    # length
     # pid1, pid2, ...
     # 1,1,1,1,7,7,9,10,10,10,10,11,11,45,54
     # 0,1,1,1,1,1,0,0,1,1,1,1,1,0,0