Question about { }

[dreid1011]

I recently helped on this thread:

https://www.mrexcel.com/forum/excel-questions/1045469-between-if-excel-formula-help.html
post #10 with my suggested solution

I feel like there should be a more compact way to use PERCENTILE/AGGREGATE in this manner. However, when I tried to use INDEX/MATCH inside {} to establish the upper and lower bounds of the array, Excel would have none of it.

I am not against using helper cells/columns, it just feels like I COULD have come up with something in a single cell.

Any and all thoughts on this are most welcome.

Thank you.

 

[DRSteele]

I think you might benefit from reviewing these pages and videos. They demonstrate that there is a way to coerce INDEX to swallow an array. It involves wrapping the array argument in two functions, and - yes - it looks really weird: N(IF(1,

https://excelxor.com/2014/09/05/index-returning-an-array-of-values/
https://www.youtube.com/watch?v=SoGTMjxsGBM
https://www.youtube.com/watch?v=Dn3gbbfH3tU&t=206s

 

[dreid1011]

I think you might benefit from reviewing these pages and videos. They demonstrate that there is a way to coerce INDEX to swallow an array. It involves wrapping the array argument in two functions, and - yes - it looks really weird: N(IF(1,

https://excelxor.com/2014/09/05/index-returning-an-array-of-values/
https://www.youtube.com/watch?v=SoGTMjxsGBM
https://www.youtube.com/watch?v=Dn3gbbfH3tU&t=206s

Thank you. I will look at these this evening.

 

[dreid1011]

DRSteele, I appreciate the links. However, I don't believe I stated very clearly what I was questioning. Basically, I tried using this:

=PERCENTILE({INDEX/MATCH,INDEX/MATCH},.5)

Which, in the link from #1 , would look something like this:

=PERCENTILE({.25,.50},.5)
=PERCENTILE(V6:W6,.5)

I wasn't trying to get INDEX to return an array, but use it two times, once to identify the lower bound, and another for the upper bound. Excel wouldn't let me even enter the formula with INDEX inside the {}.

 

[Tetra201]

Try

=PERCENTILE(CHOOSE({1,2},INDEX_MATCH,INDEX_MATCH),0.5)

 

[thisoldman]

Excel doesn't accept this formula format for me either:
=PERCENTILE({INDEX/MATCH,INDEX/MATCH},0.5)

Excel does accept this, where the curly braces are replaced by parentheses:
=PERCENTILE((INDEX/MATCH, INDEX/MATCH),0.5)
or this, where INDEX functions are used on both sides of the range operator colon:
=PERCENTILE(INDEX/MATCH:INDEX/MATCH, 0.5)

When I run the last two formulas through formula evaluation, both properly interpret the INDEX functions as references. Interesting.

 

[dreid1011]

Excel doesn't accept this formula format for me either:
=PERCENTILE({INDEX/MATCH,INDEX/MATCH},0.5)

Excel does accept this, where the curly braces are replaced by parentheses:
=PERCENTILE((INDEX/MATCH, INDEX/MATCH),0.5)
or this, where INDEX functions are used on both sides of the range operator colon:
=PERCENTILE(INDEX/MATCH:INDEX/MATCH, 0.5)

When I run the last two formulas through formula evaluation, both properly interpret the INDEX functions as references. Interesting.

Good to know. I kept thinking about that, but never tried it thinking that it wouldn't work if I didn't concatenate stuff.

 

[dreid1011]

After testing, the first formula using (INDEX/MATCH,INDEX/MATCH) returns expected results.

The second formula using INDEX/MATCH:INDEX/MATCH did not return expected results. It returned an array of the first 3 rows of the table it was referencing.

Now, I have also learned that Excel does not like either of these options using the other LOOKUP formula I ended up using for the other half of the problem.

And now, if you looked at my other post, here is the final resulting formula. The only extra cells being the lookup table in V1:W4.

=PERCENTILE(CHOOSE({1,2},LOOKUP(INDEX(V1:V4,MATCH(G5,V1:V4,1)),C5:F5,C4:F4),LOOKUP(INDEX(W1:W4,MATCH(G5,W1:W4,-1)),C5:F5,C4:F4)),(G5-INDEX(V1:V4,MATCH(G5,V1:V4,1)))/(INDEX(W1:W4,MATCH(G5,W1:W4,-1))-INDEX(V1:V4,MATCH(G5,V1:V4,1))))*B6

And I also realize that I was asking after using INDEX/MATCH within {} originally, it was not taking LOOKUP within {} either. So, apologies for the backwardness of my query.