You can use a dynamic range, define a name


=OFFSET(Sheet1!$A$1,0,0,COUNTA(Sheet1!$A:$A),COUNT A($1:$1))

will work for a table that starts in A1 in Sheet1, do insertnamedefine
put a name like MyMatrix there and use a formula like

=VLOOKUP(A1,MyMatrix,2,0)

as an example, more info here

http://www.contextures.com/xlNames01.html#Dynamic

--
Regards,

Peo Sjoblom

(No private emails please)


"Michelle" wrote in message
...
How do I change the range of data in a specific matrix, upon which other
lookup formulas are referring to. I keep getting "value" and "ref"
errors.