You're welcome. Thanks for the feedback!
Also note:
If there's text in column C you'll get a #VALUE! error when using the
*array* formula:
=SUM((A1:A5="x")*(B1:B5="y")*C1:C5)
...........A..........B..........C
1........x...........y...........0
2........x...........y...........X
3....................y............1
4........x........................1
5........x..........y............1
But, if you use this syntax in a SUMPRODUCT formula it will ignore the text
in column C:
=SUMPRODUCT(--(A1:A5="x"),--(B1:B5="y"),C1:C5)
--
Biff
Microsoft Excel MVP
"RobN" wrote in message
...
Biff, thankyou so much for that reply. All very useful.
I've discovered some text in one cell within the range J1:J370 which I'd
forgotten about, as it was only supposed to be a temporary note to myself.
(As I thought that column only had numeric values I couldn't understand
why the #VALUE error when I was also sure I'd array entered it.....it had
the curly brackets.)
Thanks again!
Rob
"T. Valko" wrote in message
...
Rick's assessment is the same that I would come to, also.
Consider this example:
..........A..........B..........C
1........x...........y...........0
2........x...........y...........1
3....................y............1
4........x........................1
5........x..........y............1
Array entered:
=SUM((A1:A5="x")*(B1:B5="y")*C1:C5)
The correct result is 2.
T = TRUE, F = FALSE
T*T*0 = 0
T*T*1 = 1
F*T*1 = 0
T*F*1 = 0
T*T*1 = 1
=SUM({0;1;0;0;1}) = 2
If you forget to array enter the formula you'll get a #VALUE! error.
If the arrays aren't the same size you'll get a #N/A error:
=SUM((A1:A10="x")*(B1:B5="y")*C1:C5)
If you use entire columns as range references in versions of Excel prior
to Excel 2007 you'll get a #NUM! error:
=SUM((A:A="x")*(B:B="y")*C:C)
If there's text in column C you'll get a #VALUE! error:
..........A..........B..........C
1........x...........y...........0
2........x...........y...........X
3....................y............1
4........x........................1
5........x..........y............1
T*T*0 = 0
T*T*X = #VALUE!
F*T*1 = 0
T*F*1 = 0
T*T*1 = 1
=SUM({0;#VALUE!;0;0;1}) = #VALUE!
If there's an error in *any* range you'll get that error.
..........A..........B..........C
1....#N/A........y...........0
2........x...........y...........1
3....................y............1
4........x........................1
5........x..........y............1
=SUM({#N/A;1;0;0;1}) = #N/A
--
Biff
Microsoft Excel MVP
"RobN" wrote in message
...
Hi Rick,
My original post was regarding text, but my last post has to do with
numeric. The text issue was answered by Biff, but I'm trying to
understand arrays which led to this question.
Rob
"Rick Rothstein (MVP - VB)" wrote
in message ...
What is in WorkSheet!J$1:J$370? Text? That is the impression I got from
your first posting. If it is text, you can't extract it the way you are
trying to by using the SUMPRODUCT function. SUMPRODUCT is basically a
mathematical function (SUM... PRODUCT), each of its parts must
ultimately be a numerical value of some sort.
Rick
"RobN" wrote in message
...
Biff, you've been a great help.
After reading through part of the cpearson site, to try and understand
this, I modified my formula......
=SUMPRODUCT(--(WorkSheet!$A$1:$A$370=$B9),--(WorkSheet!$C$1:$C$370=$C9),WorkSheet!J$1:J$370)
to an array formula........
=SUM((WorkSheet!$A$1:$A$370=$B9)*(WorkSheet!$C$1:$ C$370=$C9)*WorkSheet!J$1:J$370)
BUT I get a #Value error. I suspect it has something to do with the
last part, "WorkSheet!J$1:J$370", but I don't know what or why, as
both the other sections have a TRUE at the correct position.
Can you see why that would be?
Rob
"T. Valko" wrote in message
...
Technically, *both* formulas are formulas that work with (manipulate)
arrays. The difference is that the INDEX formula needs to be array
entered (CTRL, SHIFT, ENTER) while the SUMPRODUCT formula does not.
The programmer that developed the SUMPRODUCT function wrote this
array processing functionality directly into the function code. The
INDEX formula could also be written in such a way that it does not
need to be array entered:
=INDEX(rng1,MATCH(1,INDEX((rng2="x")*(rng3="y"),,1 ),0))
See if this helps:
http://www.cpearson.com/Excel/ArrayFormulas.aspx
--
Biff
Microsoft Excel MVP
"RobN" wrote in message
...
Biff,
Are you able to explain why this formula is an array formula
=INDEX(WorkSheet!$V$1:$V$370,MATCH(1,(WorkSheet!$A $1:$A$370=B9)*(WorkSheet!$C$1:$C$370=C9),0))
AND
why this one is not?
=SUMPRODUCT(--(WorkSheet!$A$1:$A$370=$B9),--(WorkSheet!$C$1:$C$370=$C9),WorkSheet!P$1:P$370)I
don't really understand arrays so your explanation using these
examplesmay help.Rob"T. Valko" wrote in
.. . You're welcome.
Thanks for the feedback! -- Biff Microsoft Excel MVP "RobN"
wrote in
... Thanks Biff.
Worked great!! I Just added an IfError to
get......=IFERROR(INDEX(WorkSheet!$V$1:$V$370,MA TCH(1,(WorkSheet!$A$1:$A$370=B9)*(WorkSheet!$C$1:$ C$370=C9),0)),)
Rob "T. Valko" wrote in
. .. Try this
array formula**
:=INDEX(WorkSheet!P1:P370,MATCH(1,(WorkSheet !A1:A370=B9)*(WorkSheet!C1:C370=C9),0))
** array formulas need to be entered using the key combination
ofCTRL,SHIFT,ENTER (not just ENTER) -- Biff Microsoft
Excel MVP "RobN" wrote in
. .. Is it
possible to use something like this formula, amended as required,to
have it display the text from the cell where the first two parts of
theformula are
true?=SUMPRODUCT(--(WorkSheet!$A$1:$A$370=$B9),--(WorkSheet!$C$1:$C$370=$C9),WorkSheet!P$1:P$370)
Or is something totally different needed? Could someone please
showwhat the formula would need to be? Rob