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T-buch
General User

Joined: 04 Mar 2009
Posts: 12
Location: Danmark (Denmark), København

 Posted: Wed Feb 16, 2011 1:41 pm    Post subject: Minus 25 sec from a timecode I got a value written in the code [TT]:MM:SS,00 for instance: 00:00:30,08 I want to minus 25 sec from that value so the result should be 00:00:05,08 How can I do that?_________________Thomas Buch
Robert Tucker
Moderator

Joined: 16 Aug 2004
Posts: 3367
Location: Manchester UK

 Posted: Wed Feb 16, 2011 1:56 pm    Post subject: -25/24/60/60 Calc works on time as a number and decimal fraction of days._________________LibreOffice 3.6.6 on Fedora 18, LibreOffice 4.0.2 on Ubuntu 13.04 (Double Boot)
T-buch
General User

Joined: 04 Mar 2009
Posts: 12
Location: Danmark (Denmark), København

 Posted: Wed Feb 16, 2011 2:28 pm    Post subject: Thanks But I cannot figure it out how I should understand the "format code": "25/24/60/60 " first you take 25 seconds, then 24 hours, then 60 minutes and at last 60 seconds - why is it not: -24/60/85??? I If you want to minus (or add) 25 minutes from the value in stead - how do you do that?_________________Thomas Buch
Sliderule
Super User

Joined: 29 May 2004
Posts: 2474
Location: 3rd Rock From The Sun

Posted: Wed Feb 16, 2011 2:51 pm    Post subject:

Thomas Buch:

Let us assume your TIME value is in cell A2 . . . the following formula will provide the result you want:

 Code: =TIME(HOUR(A2); MINUTE(A2); SECOND(A2) - 25)

Explanation: Using the TIME function, will return the HOUR, MINUTE and SECOND from the original cell, and, subtract 25 from the SECOND portion . . . per your description.

I hope this helps, please be sure to let me / us know.

Sliderule

Thanks to add [Solved] in your first post Title ( edit button ) if your issue has been fixed / resolved.
T-buch
General User

Joined: 04 Mar 2009
Posts: 12
Location: Danmark (Denmark), København

 Posted: Thu Feb 17, 2011 2:57 am    Post subject: Yes thanks, Sliderule - This is easy to understand - but i would also love to understand what is happening in post 2 by Robert Tucker - so I allow myself to wait a little more before adding a "Solved" hoping he or another will explain_________________Thomas Buch
Villeroy
Super User

Joined: 04 Oct 2004
Posts: 10065
Location: Germany

 Posted: Thu Feb 17, 2011 3:53 am    Post subject: All dates and times in all spreadsheets are formatted numbers in unit "Days". You may read any old book on spreadsheets, even 20 year old books, where all this is explained in depth. You add 5 to a number in order to add 5 days. You add 5/24 to a number in order to add 5 hours. You add 5/24/60 to a number in order to add 5 minutes._________________Rest in peace, oooforum.org Get help on http://forum.openoffice.org
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