software

First, apologies if this has been answered before but I couldn't find
anything close in the forums:

My problem is I need to find the first row reference if a value in one
of the columns is (unpredictably) less than 0. I have tried a mix of
Index, Match and the Excel lookup wizard but to no avail.

For example, at its simplest I have 2 columns x and y

A B
1 x y
2 1 13
3 2 6
4 3 0
5 4 -1
6 5 -12
7 6 4
etc

how do I locate the first row when the y column goes negative. I know
it is simple if I know beforehand ( in this case it is row cell A5) ,
but if the Y column varies at random, I get stuck. Any help much
appreciated
Bob

Hi!

One way:

Entered as an array using the key combo of CTRL,SHIFT,ENTER:

=IF(COUNTIF(B2:B7,quot;lt;0quot;),MATCH(TRUE,B2:B7lt;0,0) 1,quot;quot; )

Biff

quot;bobzebraquot; gt; wrote in message oups.com...
gt; First, apologies if this has been answered before but I couldn't find
gt; anything close in the forums:
gt;
gt; My problem is I need to find the first row reference if a value in one
gt; of the columns is (unpredictably) less than 0. I have tried a mix of
gt; Index, Match and the Excel lookup wizard but to no avail.
gt;
gt; For example, at its simplest I have 2 columns x and y
gt;
gt; A B
gt; 1 x y
gt; 2 1 13
gt; 3 2 6
gt; 4 3 0
gt; 5 4 -1
gt; 6 5 -12
gt; 7 6 4
gt; etc
gt;
gt; how do I locate the first row when the y column goes negative. I know
gt; it is simple if I know beforehand ( in this case it is row cell A5) ,
gt; but if the Y column varies at random, I get stuck. Any help much
gt; appreciated
gt; Bob
gt;
gt;
gt;
Since you mentioned A5, are you looking for the return to come from Column
A?
If so, try this *array* formula:

=INDEX(A1:A7,MATCH(TRUE,B1:B7lt;0,0))

--
Array formulas must be entered with CSE, lt;Ctrlgt; lt;Shift gt; lt;Entergt;, instead of
the regular lt;Entergt;, which will *automatically* enclose the formula in curly
brackets, which *cannot* be done manually.
--
HTH,

RD

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quot;bobzebraquot; gt; wrote in message oups.com...
gt; First, apologies if this has been answered before but I couldn't find
gt; anything close in the forums:
gt;
gt; My problem is I need to find the first row reference if a value in one
gt; of the columns is (unpredictably) less than 0. I have tried a mix of
gt; Index, Match and the Excel lookup wizard but to no avail.
gt;
gt; For example, at its simplest I have 2 columns x and y
gt;
gt; A B
gt; 1 x y
gt; 2 1 13
gt; 3 2 6
gt; 4 3 0
gt; 5 4 -1
gt; 6 5 -12
gt; 7 6 4
gt; etc
gt;
gt; how do I locate the first row when the y column goes negative. I know
gt; it is simple if I know beforehand ( in this case it is row cell A5) ,
gt; but if the Y column varies at random, I get stuck. Any help much
gt; appreciated
gt; Bob
gt;
gt;
gt;Guys: brilliant many thanks; works a treat. More importantly you have
opened door on Array formulas. I simply hadn't reaslied they existed in
Excel. But I suppose without a first example it doesn't naturally occur
to you that they may solve your problem.
thanks again.

Bob