Whats better Lookup or Function Formula

[Jocko_MacDuff116]

Im am trying to calculate the following. What is the best way to do it.

if C2 <> C1 (value of prev row same col)
and if D2="O" or "B" then F2= 1 (numeric result)

else if C2 = C1 (value of prev row same col)
and if D2="B" then F2= 2 (numeric result)
or if D2="S" then F2= 3 (numeric result)
or if D2="X" then F2= 4 (numeric result)
else "Error"

How would I write the formula??

 

[Bob Phillips]

=IF(C2<>C1,IF(D2="O",1,"what in this
case??"),IF(D2="B",2,IF(D2="S",3,IF(D2="X",4,"Error!!"))))

--
HTH

Bob

(there's no email, no snail mail, but somewhere should be gmail in my addy)

 

[JE McGimpsey]

One way:

F2: =IF(C2<>C1, IF(OR(D2="O", D2="B"), 1, "Error"), IF(D2="B", 2,
IF(D2="S", 3, IF(D2="X", 4, "Error"))))

 

[Teethless mama]

=IF(AND(C2<>C1,OR(D2={"O","B"})),1,IF(C2=C1,IF(D2="B",2,IF(D2="S",3,IF(D2="X",4,"Error"))),"Error"))