{
  "id": 1393,
  "title": "Verbose=TRUE to see model converge",
  "url": "/competitions/WhatDoYouKnow/discussion/1393",
  "author_name": "idris",
  "post_date": "2012-02-23T21:07:51.847000",
  "votes": 0,
  "comment_count": 0,
  "views": 2778,
  "content": "<p>In case you want to see the status of the benchmark model at different iterations as it optimizes add the verbose=TRUE option to the lmer() call.</p>\r\n<p>&nbsp; rasch = lmer(correct ~ 1 &#43; (1|user_id) &#43; (1|question_id),<br>\r\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; data=training[training$track_name==track, <br>\r\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; c(&quot;correct&quot;,&quot;user_id&quot;,&quot;question_id&quot;)], <br>\r\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; family=binomial, REML=FALSE, verbose=TRUE)<br>\r\n<br>\r\nI found it interesting to watch the iteration output of the model as it slowly converged.</p>",
  "messages": [
    {
      "id": 8682,
      "postDate": "2012-02-23T21:07:51.847Z",
      "content": "<p>In case you want to see the status of the benchmark model at different iterations as it optimizes add the verbose=TRUE option to the lmer() call.</p>\r\n<p>&nbsp; rasch = lmer(correct ~ 1 &#43; (1|user_id) &#43; (1|question_id),<br>\r\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; data=training[training$track_name==track, <br>\r\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; c(&quot;correct&quot;,&quot;user_id&quot;,&quot;question_id&quot;)], <br>\r\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; family=binomial, REML=FALSE, verbose=TRUE)<br>\r\n<br>\r\nI found it interesting to watch the iteration output of the model as it slowly converged.</p>"
    }
  ],
  "comments": [],
  "raw_markdown_by_id": {
    "8682": ""
  }
}