How to extract unique values from an array EXCEPT specified values? - excel

Question

I am already abel to extract unique values, in excel, from an array using this function:
{=INDEX(list,MATCH(0,COUNTIF(uniques,list),0))}
However, I want to specify certain values for excel not to return. Is there any way to specify values that I don't want to be found within the already specified "list"? The ideal outome would be something like this:
I am also using excel version 2101.
Any information is helpful, thanks!

Answer 1

From your example, I ASSUME you want to exclude the lines starting with Round.
Try:
=LET(x,UNIQUE(List),FILTER(x,LEFT(x,5)<>"Round"))
or
=UNIQUE(FILTER(List,(LEFT(List,5)<>"Round")))
I'm not sure if it is more efficient to filter a smaller list, as is done in the first formula; or to avoid using LET as is done in the second formula.
EDIT
This can also be done using FILTERXML and TEXTJOIN which should be present in all Windows versions 2016+
=FILTERXML("<t><s>"&TEXTJOIN("</s><s>",,list)&"</s></t>","//s[not(starts-with(.,'Round')) and not(preceding-sibling::*=.)]")
the xPath
not(starts-with(.,'Round')) : should be obvious
Return only unique values:
and not(preceding-sibling::*=.) : do not return a node if any preceding-sibling matches the current node being tested