Why not write a UDF that could be used in any file if you store it in
Personal.xls
best wishes
--
Bernard V Liengme
Microsoft Excel MVP
http://people.stfx.ca/bliengme
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"Steve" wrote in message
...
Has anyone written an interpolation function for Excel? I have an
equation
that works, but it is a pain to edit and check each time. There should be
a
way to standardize it for use with most tables.