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Tricky array problem….
I have a (small) problem which I am unable to solve. Perhaps some bright wizard has an idea. I would like to multiply two arrays located in equal sized rows but invert one first, i.e. if the values a A, B, C and X, Y, Z, I want AZ+BY+CX. e.g. if the ranges are 1,2,3 and 1,2,3, my answer should be 10. My ranges are dynamic so could become much larger than 3 elements. I tried to invert one of the arrays using the array formula: =OFFSET(Mult,0,COLUMNS(Mult)-1+(MIN(COLUMN(Mult))-COLUMN(Mult))) where Mult is the array field (am quite proud of this!!!). If I use F9, this formula does invert the array. However, as soon as I try to use this in a larger formula to complete the multiplication, I get #Value! : =SUM(OFFSET(Mult,0,COLUMNS(Mult)-1+(MIN(COLUMN(Mult))-COLUMN(Mult)))*CinList) where CinList is the other array. Any ideas much appreciated.... -- MarkCCB ------------------------------------------------------------------------ MarkCCB's Profile: http://www.excelforum.com/member.php...o&userid=37148 View this thread: http://www.excelforum.com/showthread...hreadid=568717 |
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#2
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Tricky array problem….
"MarkCCB" skrev i en
meddelelse ... I have a (small) problem which I am unable to solve. Perhaps some bright wizard has an idea. I would like to multiply two arrays located in equal sized rows but invert one first, i.e. if the values a A, B, C and X, Y, Z, I want AZ+BY+CX. e.g. if the ranges are 1,2,3 and 1,2,3, my answer should be 10. My ranges are dynamic so could become much larger than 3 elements. I tried to invert one of the arrays using the array formula: =OFFSET(Mult,0,COLUMNS(Mult)-1+(MIN(COLUMN(Mult))-COLUMN(Mult))) where Mult is the array field (am quite proud of this!!!). If I use F9, this formula does invert the array. However, as soon as I try to use this in a larger formula to complete the multiplication, I get #Value! : =SUM(OFFSET(Mult,0,COLUMNS(Mult)-1+(MIN(COLUMN(Mult))-COLUMN(Mult)))*CinList) where CinList is the other array. Any ideas much appreciated.... -- MarkCCB Hi Mark =SUM(N(OFFSET(Mult,0,COLUMNS(Mult)-1+(MIN(COLUMN(Mult))-COLUMN(Mult))))*CinList) Will do the trick. Using the function N() with OFFSET() sometimes works, sometimes doesn't. (One of the charms one enjoys working with array formulae :-) In this situation you can skip <Shift<Ctrl<Enter and just use <Enter by using SUMPRODUCT() =SUMPRODUCT(N(OFFSET(Mult,0,COLUMNS(Mult)-1+(MIN(COLUMN(Mult))-COLUMN(Mult))))*CinList) -- Best regards Leo Heuser Followup to newsgroup only please. |
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#3
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Tricky array problem….
Leo, awesome, you are truly a wizard ! It works ! Thankyou so much ! I spent half a day messing about with this....... Best regards -- MarkCCB ------------------------------------------------------------------------ MarkCCB's Profile: http://www.excelforum.com/member.php...o&userid=37148 View this thread: http://www.excelforum.com/showthread...hreadid=568717 |
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#4
Posted to microsoft.public.excel.misc
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Tricky array problem….
"MarkCCB" skrev i en
meddelelse ... Leo, awesome, you are truly a wizard ! It works ! Thankyou so much ! I spent half a day messing about with this....... Best regards -- MarkCCB You're welcome, Mark, and thanks for the feedback :-) Leo Heuser |
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