{
  "id": 22901,
  "title": "Ever Forget to Apply e^p-1 to Your Prediction?",
  "url": "/competitions/grupo-bimbo-inventory-demand/discussion/22901",
  "author_name": "patcoady",
  "post_date": "2016-08-17T00:02:18.757000",
  "votes": 1,
  "comment_count": 0,
  "views": 296,
  "content": "<p>Like many people, I transform my training data by log(1+p). I was cleaning up accumulated garbage in my scripts and all of a sudden I was getting LB scores of 0.9, 1 even 1.1.</p>\n\n<p>I thought I had added some nice new features to my model and now I was getting terrible scores.</p>\n\n<p>As you can guess from the title, I eliminated the line that applied expm1() to all the model predictions before. Only took 1/2 a day to figure out!</p>",
  "messages": [
    {
      "id": 131428,
      "postDate": "2016-08-17T00:02:18.757Z",
      "content": "<p>Like many people, I transform my training data by log(1+p). I was cleaning up accumulated garbage in my scripts and all of a sudden I was getting LB scores of 0.9, 1 even 1.1.</p>\n\n<p>I thought I had added some nice new features to my model and now I was getting terrible scores.</p>\n\n<p>As you can guess from the title, I eliminated the line that applied expm1() to all the model predictions before. Only took 1/2 a day to figure out!</p>",
      "rawMarkdown": "Like many people, I transform my training data by log(1+p). I was cleaning up accumulated garbage in my scripts and all of a sudden I was getting LB scores of 0.9, 1 even 1.1.\r\n\r\nI thought I had added some nice new features to my model and now I was getting terrible scores.\r\n\r\nAs you can guess from the title, I eliminated the line that applied expm1() to all the model predictions before. Only took 1/2 a day to figure out!",
      "votes": 1
    }
  ],
  "comments": [],
  "raw_markdown_by_id": {
    "131428": "Like many people, I transform my training data by log(1+p). I was cleaning up accumulated garbage in my scripts and all of a sudden I was getting LB scores of 0.9, 1 even 1.1.\r\n\r\nI thought I had added some nice new features to my model and now I was getting terrible scores.\r\n\r\nAs you can guess from the title, I eliminated the line that applied expm1() to all the model predictions before. Only took 1/2 a day to figure out!"
  }
}