Re: [libreoffice-users] time and date difference

At 01:46 24/04/2015 -0700, Simone Serra wrote:
> I am using LibreOffice Version: 4.3.0.4 and I am having issues 
> calculating time differences. I would like to calculate the time 
> difference in hours between the following
> date/times:
> E14 = 23/04/2015 15:30
> E15 = 25/04/2015 16:20
> E16 = DAYS(E15;E14)
>
> But I get a value error ...

This should work (if your date locale is set appropriately) if these 
are genuine date values, i.e. numbers formatted as "DD/MM/YYYY HH:MM" 
- but not if the cell contents are text values.

> so I split data:
>
> F14 = 23/04/2015
> F15 = 25/04/2015
> F16 = DAYS(F15;F14)  ---> Ok, I get 2, multiply  x 24 = 48h and it's fine

This mean that you *do* now have these values as genuine dates, not text.

> then for the hours
>
> G14 = 15:30
> G15 = 16:20
> G16 = (G15<G14)+G15-G16 (as suggested by the wiki:
> https://help.libreoffice.org/Calc/Calculating_Time_Differences)
> but again I have a value error..

If you really have put a formula including G16 into G16, then you 
have a circular reference, and you may see Error 522.

> does anyone knows how can I solve this??

 If you use
=(G15<G14)+G15-G14
it should work (whether you have times or text).

It's important to understand the effect of cell formatting in 
spreadsheets. When you type something into a cell, the value may be 
converted and the cell formatting may be changed. Such changes may 
not be immediately evident, but you need to appreciate them if you 
are to see why formulae work or don't work. There are two facilities 
that may help:

o Unless you have specifically set cell alignment, text values will 
be left-aligned and numbers (including date/times) will be right-aligned.

o Go to View | Value Highlighting (or Ctrl+F8). Text values show in 
black and numbers (including date/times) in blue.

I trust this helps.

Brian Barker


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