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Re: [libreoffice-users] First occurrence of a negative number in a column

```Hi :)
Working out the first day temperatures plummeted below zero here was the only day this year that i
got a chance to sleep outdoors.  I completely missed all of the long hot summer due to moving.  I
got a bit of a surprise when i poked my head out of ny bivvie and saw the landscape covered in
frost!
Regards from
Tom :)

```
```________________________________
From: Kolbjørn Stuestøl <kolbjoern@stuestoel.no>
To: users@global.libreoffice.org
Sent: Wednesday, 23 January 2013, 15:16
Subject: Re: [libreoffice-users] First occurrence of a negative number in a column

Den 23.01.2013 14:32, skreiv Brian Barker:
```
```At 13:44 23/01/2013 +0100, Kolbjørn Stuestøl wrote:
```
```Den 23.01.2013 07:29, skreiv Brian Barker:
```
```At 22:57 22/01/2013 +0100, Kolbjørn Stuestøl wrote:
```
```Is there any way to find the first occurrence of a number less (or greater) than a given
number in an unsorted array or a column?
Example: A1:A31 contains a list of temperatures a given month. I would like to find the first
day the temperature is below 0 degrees (metric).
```
```
What happens if there is no day in the month when the temperature was negative?  Let's say you
want the value zero for the resulting day number in this case.

This is a little messy, but it works:

o In B1, enter =A1<0 and fill it down the column to B31. This generates TRUE for your negative
values and FALSE otherwise.

o In your result cell, enter =N(MATCH(TRUE;B1:B31;0)) .  The MATCH() function searches for the
first TRUE value in the column B values and returns the relative position in the array of the
first match.  (Note that this is not necessarily the row number, though will be in your
example.)  This would return the #N/A error if there is no negative temperature; the N()
function makes no change to real dates but converts this error to zero.
```
```
Alas the N() function does not works as supposed. It returns "#N/A" if there are no numbers
below zero. I have to figure out a solution.
```
```
Oh dear: sorry.  It indeed appears that the behaviour of N() was changed (between versions 3.5.
and 3.6) and it no longer works as I'd imagined.  So you'll need something (even messier) such as
=IF(ISERROR(MATCH(TRUE;B1:B31;0));0;MATCH(TRUE;B1:B31;0))
```
```Thanks. I think this will help me out. Although I would have preferred a simpler version :-)

I am new to LibreOffice.
I do have a working program calculating meteorological statistics written in a Pascal variant many
years ago. But rewriting it in Calc 4.0 just to learn a bit about this program too.
Kolbjoern
```
```
I trust this helps.

Brian Barker
```
```

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```
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