# Excel/array formula

Question
Hi Tom

On Sheet2, range a2:b510 there is a list of information.  In column A is a list of names; in column B there is a list of class codes.

On the same sheet I would like to type in a class code in cell D2.  When I do this, I would like the names of each student in that class to appear in column E starting at E2.

Could you write this formula for me please? I believe that I will need an array formula; this outside of my skillset.

Chris

Christopher,
in Cell E2
e2:  =IFERROR(INDEX(A:A,SMALL(IF(\$B\$2:\$B\$510=\$D\$2,ROW(\$B\$2:\$B\$510)),ROW(\$A1)),1),"")

enter with Ctrl+Shift+Enter rather than just enter.

then select E2 and drag fill down column E for as far as you would ever have names to list (maximum class size).

That worked for me.

--
Regards,
Tom Ogilvy
Questioner's Rating
 Rating(1-10) Knowledgeability = 10 Clarity of Response = 10 Politeness = 10 Comment Perfect. Thank you

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#### Tom Ogilvy

##### Expertise

Selected as an Excel MVP by Microsoft since 1999. Answering Excel questions in Allexperts since its inception in 2001. Able to answer questions on almost all aspects of Excel's internal capabilities. If seeking a VBA solution, please specify that in your question itself so I give you the answer you want. [Excel has weak protection - if you are distributing an application, I don't answer questions on how to protect your project from your users.]

##### Experience

Extensive experience.

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Master of Science (MS) degree Operations Research (ORSA)

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Microsoft MVP in Excel.