{
  "id": 190444,
  "title": "Questions regarding building sequences on Private test",
  "url": "/competitions/riiid-test-answer-prediction/discussion/190444",
  "author_name": "EnricRovira",
  "post_date": "2020-10-11T20:31:23.450000",
  "votes": 0,
  "comment_count": 0,
  "views": 0,
  "content": "<p>Hi, </p>\n<p>In order to build a sequence model i have few questions on how to make it work on private test set.</p>\n<ul>\n<li><p>Test private data batches follow some order? For example if in batch 1 and batch 30 user A appears, will it be in order or we have to manage it with timestamp feature?</p></li>\n<li><p>The private test set users that also appear in train have 'holes' between the sequence in train and the sequence in test?</p></li>\n<li><p>Why some users have <code>prior_group_answers_correct</code> on NaN ans some others no? Does this means that the users with NaNs appear on Train and users with values don't</p></li>\n</ul>\n<p>Thanks in advance</p>",
  "messages": [
    {
      "id": 1046603,
      "postDate": "2020-10-11T20:31:23.450Z",
      "content": "<p>Hi, </p>\n<p>In order to build a sequence model i have few questions on how to make it work on private test set.</p>\n<ul>\n<li><p>Test private data batches follow some order? For example if in batch 1 and batch 30 user A appears, will it be in order or we have to manage it with timestamp feature?</p></li>\n<li><p>The private test set users that also appear in train have 'holes' between the sequence in train and the sequence in test?</p></li>\n<li><p>Why some users have <code>prior_group_answers_correct</code> on NaN ans some others no? Does this means that the users with NaNs appear on Train and users with values don't</p></li>\n</ul>\n<p>Thanks in advance</p>",
      "rawMarkdown": "Hi, \n\nIn order to build a sequence model i have few questions on how to make it work on private test set.\n\n- Test private data batches follow some order? For example if in batch 1 and batch 30 user A appears, will it be in order or we have to manage it with timestamp feature?\n\n- The private test set users that also appear in train have 'holes' between the sequence in train and the sequence in test?\n\n- Why some users have `prior_group_answers_correct` on NaN ans some others no? Does this means that the users with NaNs appear on Train and users with values don't\n\nThanks in advance"
    }
  ],
  "comments": [],
  "raw_markdown_by_id": {
    "1046603": "Hi, \n\nIn order to build a sequence model i have few questions on how to make it work on private test set.\n\n- Test private data batches follow some order? For example if in batch 1 and batch 30 user A appears, will it be in order or we have to manage it with timestamp feature?\n\n- The private test set users that also appear in train have 'holes' between the sequence in train and the sequence in test?\n\n- Why some users have `prior_group_answers_correct` on NaN ans some others no? Does this means that the users with NaNs appear on Train and users with values don't\n\nThanks in advance"
  }
}