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Problem with function "datenum"

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Eveline B
Eveline B on 13 Oct 2015
Closed: MATLAB Answer Bot on 20 Aug 2021
Hello all,
I use a script where datenum is used, but it works randomly:
>> datenum('17:54:24.752','HH:MM:SS.FFF')
??? Error using ==> datenum at 174
DATENUM failed.
Caused by:
Error using ==> dtstr2dtnummx
Failed on converting date string to date number.
>> datenum('17:54:24.752','HH:MM:SS.FFF')
ans =
7.3597e+005
What could cause that? The date format was used planty of times before.
  2 Comments
per isakson
per isakson on 13 Oct 2015
Edited: per isakson on 13 Oct 2015
Most likely the problem is caused by an erroneous value of an input argument. See Debug a MATLAB Program
Stephen23
Stephen23 on 13 Oct 2015
Could there be non-printing characters in the string? These often pop up in online sourced data or from spreadsheets, and could easily cause an error without being visible themselves.

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Answers (1)

Peter Perkins
Peter Perkins on 13 Oct 2015
Edited: Peter Perkins on 13 Oct 2015
What version/platform of MATLAB is this? This sounds like a bug that was fixed in R2013a.
The bug report includes a patch for earlier versions.
  3 Comments
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Peter Perkins
Peter Perkins on 16 Oct 2015
Click on the bug report I linked to.
Walter Roberson
Walter Roberson on 16 Oct 2015
Unfortunately the bug report does not appear to include patches for R2009a or R2009b.

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