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PO
primarykey
Id
2718512
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2010-04-27T03:27:22.057
FavoriteCount
0
LastActivityDate
2010-04-27T15:53:21.760
LastEditDate
2017-05-23T10:33:15.250
LastEditorUserId
-1
OwnerUserId
232610
ParentId
2718308
PostTypeId
2
Score
4
ViewCount
0
LastEditorDisplayName
text
Body
When I copy-paste your function, I get the following output <pre><code>>> trial(0) 0 0 </code></pre> In my many years using Matlab, I have found a quite a number of strange behaviours and Matlab bugs, but I have never seen Matlab change a variable just like that. Thus, my suspicion is that there really is a bug in your code. In order to find the problem, I suggest that you set a stop in every line where <code>test</code> appears, so that you can check its value as you go through the function. Alternatively, you can periodically set conditional stops (set a stop normally, then right-click to enter a condition, such as <code>test==1</code>) so that the function halts execution when <code>test</code> has taken on an undesired value. This should allow you to quickly identify the place where bad stuff happens. Once you identify the problematic code block, you can create a (relatively) small test case and post it here, in case the error has not become obvious. EDIT <a href="https://stackoverflow.com/questions/2718308/matlab-is-changing-variables-when-i-do-not-want-it-to/2720045#2720045">@woodchips</a> has suggested several possible causes for your bug. My money would be on the precision problem, i.e. that you compare <code>0.000000001</code> to <code>0</code>. To find such a problem, put a debug stop on every if-statement that involves <code>test</code> and check whether <code>round(test)==test</code>. If the output is <code>false</code>, you just replace <code>test</code> with <code>round(test)</code> in your if-statement, and you're done.
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1. POMATLAB is changing variables when I do not want it to
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