Index Match with multiple nested if statements

E

equals

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Sep 22, 2017
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2
Hi,
I have two tables, one with "source" data as follows:
[TABLE="class: grid, width: 500, align: center"]
<tbody>[TR]
[TD="align: center"]A[/TD]
[TD="align: center"]B[/TD]
[TD="align: center"]C[/TD]
[TD="align: center"]D[/TD]
[TD="align: center"]E[/TD]
[TD="align: center"]F[/TD]
[TD="align: center"]G[/TD]
[TD="align: center"]H[/TD]
[TD="align: center"]I[/TD]
[TD="align: center"]J[/TD]
[TD="align: center"]K[/TD]
[/TR]
[TR]
[TD]Lookup[/TD]
[TD]Helper[/TD]
[TD]High[/TD]
[TD]Low[/TD]
[TD]Geo_Lookup[/TD]
[TD]Geo_High[/TD]
[TD]Geo_Low[/TD]
[TD]Other[/TD]
[TD]Class[/TD]
[TD]Description[/TD]
[TD]Important[/TD]
[/TR]
[TR]
[TD]A1[/TD]
[TD]A1[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]11[/TD]
[TD]Apples & Oranges[/TD]
[TD]N[/TD]
[/TR]
[TR]
[TD]A2[/TD]
[TD]#ALT [/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]2[/TD]
[TD]Apples & Pears[/TD]
[TD]N[/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD]A2[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]55[/TD]
[TD]High Apples & Pears[/TD]
[TD]Y[/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]A2[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]56[/TD]
[TD]Low Apples & Pears[/TD]
[TD]N[/TD]
[/TR]
[TR]
[TD]A2a[/TD]
[TD]A2a[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]13[/TD]
[TD]Oranges & Plums[/TD]
[TD]Y[/TD]
[/TR]
[TR]
[TD]A2c[/TD]
[TD]#ALT 2[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]14[/TD]
[TD]Plums & Pears[/TD]
[TD]N[/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD]A2c[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]15[/TD]
[TD]Pears & Plums High[/TD]
[TD]Y[/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]A2c[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]Pears & Plums Low[/TD]
[TD]Y[/TD]
[/TR]
[TR]
[TD]B1[/TD]
[TD]#GEO [/TD]
[TD][/TD]
[TD][/TD]
[TD]#GEO _ALT[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]1[/TD]
[TD]Apples & Pears[/TD]
[TD]Y[/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD]B1[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]Apples & Pears High[/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]B1[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]Apples & Pears Low[/TD]
[TD]Y[/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]B1[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]GEOApples & Pears High[/TD]
[TD]N[/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]B1[/TD]
[TD][/TD]
[TD][/TD]
[TD]GEOApples & Pears Low[/TD]
[TD]Y[/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]B1[/TD]
[TD][/TD]
[TD]OTHER Apples & Pears[/TD]
[TD]N[/TD]
[/TR]
[TR]
[TD]B2[/TD]
[TD]B2[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]6[/TD]
[TD]Oranges & Pears[/TD]
[TD]Y[/TD]
[/TR]
[TR]
[TD]B2a[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]9[/TD]
[TD]Kiwi & Lime[/TD]
[TD]N[/TD]
[/TR]
[TR]
[TD]B3[/TD]
[TD]#GEO [/TD]
[TD][/TD]
[TD][/TD]
[TD]#GEO _ALT[/TD]
[TD][/TD]
[TD][/TD]
[TD]#ALT [/TD]
[TD]11[/TD]
[TD]Lime[/TD]
[TD]N[/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD]B3[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]Lime High[/TD]
[TD]Y[/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]B3[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]Lime Low[/TD]
[TD]N[/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]B3[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]GEO Lime High[/TD]
[TD]Y[/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]B3[/TD]
[TD][/TD]
[TD][/TD]
[TD]Geo Lime Low[/TD]
[TD]Y[/TD]
[/TR]
[TR]
[TD]...[/TD]
[TD]...[/TD]
[TD]...[/TD]
[TD]...[/TD]
[TD]...[/TD]
[TD]...[/TD]
[TD]...[/TD]
[TD]...[/TD]
[TD]...[/TD]
[TD]...[/TD]
[TD]...[/TD]
[/TR]
</tbody>[/TABLE]

And a second "results" table which I wish to write some formulae for to lookup the description based upon its Geology and Height

[TABLE="class: grid, width: 500, align: center"]
<tbody>[TR]
[TD="align: center"]A[/TD]
[TD="align: center"]B[/TD]
[TD="align: center"]C[/TD]
[TD="align: center"]D[/TD]
[TD="align: center"]E[/TD]
[TD="align: center"]F[/TD]
[TD="align: center"]G[/TD]
[TD="align: center"]H[/TD]
[/TR]
[TR]
[TD]Uid[/TD]
[TD]Definition[/TD]
[TD]Resolves_to[/TD]
[TD]Description[/TD]
[TD]Important[/TD]
[TD]Geo[/TD]
[TD]Height[/TD]
[TD]Class[/TD]
[/TR]
[TR]
[TD]G1[/TD]
[TD]A1a[/TD]
[TD]A1[/TD]
[TD][/TD]
[TD][/TD]
[TD]A[/TD]
[TD]50[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]G2[/TD]
[TD]B3[/TD]
[TD]#GEO [/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]11[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]G3[/TD]
[TD]A2a[/TD]
[TD]A2a[/TD]
[TD][/TD]
[TD][/TD]
[TD]B[/TD]
[TD]2[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]G4[/TD]
[TD]A2[/TD]
[TD]#ALT [/TD]
[TD][/TD]
[TD][/TD]
[TD]A[/TD]
[TD]200[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]G5[/TD]
[TD]B2b[/TD]
[TD]B2[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]5[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]G6[/TD]
[TD]B2[/TD]
[TD]B2[/TD]
[TD][/TD]
[TD][/TD]
[TD]A[/TD]
[TD]36[/TD]
[TD][/TD]
[/TR]
</tbody>[/TABLE]
The definition code is not always contained in the lookup table, but its parent code is so I am using the following formula to check if its present and remove the trailing sub category (the trailing alpha character) if it is not:
{=IFNA(VLOOKUP(B2:B13268,Source_Lookup_Table!A:M,2,FALSE),VLOOKUP(IF(ISNUMBER(-RIGHT(B2:B13268)),B2:B13268,LEFT(B2:B13268,LEN(B2:B13268)-1)),Source_Lookup_Table!A:M,2,FALSE))}

I would like to populate the "results" table columns D, E and H with the description/importance/class of the closest category.

The helper # codes need the following logic:
#ALT
Where "Source_Lookup_Table!B:B" = "#ALT " then choose between columns C (High) and D (Low) based upon Height >=50

#ALT 2
Where "Source_Lookup_Table!B:B" = "#ALT 2" then choose between columns C (High) and D (Low) based upon Height <=10

#GEO
Where "Source_Lookup_Table!B:B = "#GEO " check if "Results_Table!F:F" (Geo column) = A
If it does - Check the altitude is >=50 and lookup column F (Geo_High) or if <50 column G (Geo_Low)
If Column F (Geo) = B then check if it exists (or its non sub category) as a separate row in column H - if NA (cannot be found) then find it in Column A and then read column H which will resolve to "#ALT " and can therefore be resolved using columns C and D as above.

This is where I am at so far (although I currently have a few more columns in my sheet) - I am using index match so I can write the formulae and then just change the column number match resolves to extract the data I need:
{=IFS((M2:M13268>=50)*(G2:G13268="#ALT "),(IFNA(INDEX(Source_Lookup_Table!C:C,MATCH(E2:E13268,Source_Lookup_Table!C:C,0)),INDEX(Source_Lookup_Table!C:C,MATCH(F2:F13268,Source_Lookup_Table!C:C,0)))),(M2:M13268<50)*(G2:G13268="#ALT "),(IFNA(INDEX(Source_Lookup_Table!D:D,MATCH(E2:E13268,Source_Lookup_Table!D:D,0)),INDEX(Source_Lookup_Table!D:D,MATCH(F2:F13268,Source_Lookup_Table!D:D,0)))),(M2:M13268<=10)*(G2:G13268="#ALT 2"),IFNA(INDEX(Source_Lookup_Table!D:D,MATCH(E2:E13268,Source_Lookup_Table!D:D,0)),INDEX(Source_Lookup_Table!D:D,MATCH(F2:F13268,Source_Lookup_Table!D:D,0))),(M2:M13268>10)*(G2:G13268="#ALT 2"),IFNA(INDEX(Source_Lookup_Table!C:C,MATCH(E2:E13268,Source_Lookup_Table!C:C,0)),INDEX(Source_Lookup_Table!C:C,MATCH(F2:F13268,Source_Lookup_Table!C:C,0))),G2:G13268="#GEO ",VLOOKUP(F2:F13268,Source_Lookup_Table!A:M,5,FALSE),TRUE,G2:G13268)}

Because I have >13200 rows I am using {array formula}. but I have discovered lots of things like AND do not work so I have tried IF((A1>3)*(B1="#GEO ")) and lots of ISNUMBER statements to keep things true of false. I have managed to get somewhere with the first two bits of logic, but it has failed again when trying to implement the ""#GEO " logic.. It is also taking a very long time to calculate on my laptop, causing excel to freeze for minutes at a time so I was hoping there might be a more efficient method?

Any guidance very gratefully received.
 

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I meant to say, column E (geo_lookup) can have a value (i.e. A3b) or "#GEO_ALT" which is when I would like to check the altitude and resolve between Column F (Geo_High) and Column G (Geo_Low)
 
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