{
  "id": 195388,
  "title": "i am newbie, what means \" Read -1 as null, for lectures.\" ? ",
  "url": "/competitions/riiid-test-answer-prediction/discussion/195388",
  "author_name": "",
  "post_date": "2020-11-05T07:17:57.917254600Z",
  "votes": null,
  "comment_count": 1,
  "views": 0,
  "content": "<p>i am newbie, what means \" Read -1 as null, for lectures.\" ?</p>\n<p>thanks</p>",
  "messages": [
    {
      "id": "1069978",
      "postDate": "11/05/2020 07:17:57",
      "content": "<p>i am newbie, what means \" Read -1 as null, for lectures.\" ?</p>\n<p>thanks</p>",
      "rawMarkdown": "i am newbie, what means \" Read -1 as null, for lectures.\" ?\n\nthanks",
      "votes": null
    },
    {
      "id": "1070223",
      "postDate": "11/05/2020 14:00:47",
      "content": "<p>It would be helpful if you add a bit more context to your question. However, I am going to assume that you are talking about the values \"-1\" in the columns \"user_answer\" and \"answered_correctly\". The rows in train.csv are data for different types of content offered to the students, namely questions and lectures. Since a lecture does not contain a question that the learner needs to answer, they used the value \"-1\" to indicate that there was no answer (and that there is no data if the answer was correct or not).</p>",
      "rawMarkdown": "It would be helpful if you add a bit more context to your question. However, I am going to assume that you are talking about the values \"-1\" in the columns \"user_answer\" and \"answered_correctly\". The rows in train.csv are data for different types of content offered to the students, namely questions and lectures. Since a lecture does not contain a question that the learner needs to answer, they used the value \"-1\" to indicate that there was no answer (and that there is no data if the answer was correct or not).",
      "votes": null
    }
  ],
  "comments": [
    {
      "id": 1070223,
      "author_name": "zimcke",
      "author_url": "",
      "post_date": "11/05/2020 14:00:47",
      "content": "<p>It would be helpful if you add a bit more context to your question. However, I am going to assume that you are talking about the values \"-1\" in the columns \"user_answer\" and \"answered_correctly\". The rows in train.csv are data for different types of content offered to the students, namely questions and lectures. Since a lecture does not contain a question that the learner needs to answer, they used the value \"-1\" to indicate that there was no answer (and that there is no data if the answer was correct or not).</p>",
      "votes": null,
      "replies": []
    }
  ],
  "raw_markdown_by_id": {
    "1069978": "i am newbie, what means \" Read -1 as null, for lectures.\" ?\n\nthanks",
    "1070223": "It would be helpful if you add a bit more context to your question. However, I am going to assume that you are talking about the values \"-1\" in the columns \"user_answer\" and \"answered_correctly\". The rows in train.csv are data for different types of content offered to the students, namely questions and lectures. Since a lecture does not contain a question that the learner needs to answer, they used the value \"-1\" to indicate that there was no answer (and that there is no data if the answer was correct or not)."
  },
  "source": "meta"
}