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From: SourceForge.net <no...@so...> - 2004-08-27 15:50:06
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Bugs item #1017518, was opened at 2004-08-27 11:15 Message generated for change (Comment added) made by gustav_delius You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=439479&aid=1017518&group_id=44411 Category: Marking Group: None >Status: Closed >Resolution: Works For Me Priority: 8 Submitted By: Gustav W Delius (gustav_delius) Assigned to: Nobody/Anonymous (nobody) Summary: Problem with rounded teacher's answer Initial Comment: When viewing a question as a teacher, AiM should fill in the answer field with the teacher's answer given in the question code and mark it as correct. However it appears that AiM first rounds the teacher's answer to usually three significant figures and therefore then marks it as incorrect. Surprisingly this only happens sometimes. ---------------------------------------------------------------------- >Comment By: Gustav W Delius (gustav_delius) Date: 2004-08-27 15:50 Message: Logged In: YES user_id=737246 Sorry, this was entirely my own stupidity. I had wanted to give the teacher's answer to 6 significant figures and therefore gave it as evalf(ans,6). I was then surprised that it was printed with less than 6 significant figures. What I had forgotten was that the evalf(ans,6) command does NOT evaluate ans and then rounds to 6 figures. Rather it first switches to 6 figure arithmetic and then evaluates ans. Depending on what calculation is required to do the evaluation that can of course lead to fewer significant figures. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=439479&aid=1017518&group_id=44411 |
