Bob,
The second half of the formula uses C1-Sheet1!C52 so (I believe)
using your solution will give an incorrect result as in your response both
portions are using C1+Sheet1!C52.

"Bob Phillips" wrote:

To start I would create a name (InsertNameDefine...) of say Half with a
refers to value of

=0.5*(C1+Sheet1!C52)

then another for one formula of say P0 with a refers to value of

=(POISSON(0,Half,FALSE))

and then use

(POISSON(1,0.Half,FALSE))*P0+
(POISSON(2,0.Half,FALSE))*P0+
(POISSON(2,0.Half,FALSE))*P0+
(POISSON(3,0.Half,FALSE))*P0+
(POISSON(4,0.Half,FALSE))*P0+
(POISSON(5,0.Half,FALSE))*(POISSON(6,0.5*(C1-Sheet1!C52),FALSE))+
(POISSON(7,0.Half,FALSE))*P0+
(POISSON(2,0.Half,FALSE))*(POISSON(1,0.5*(C1-Sheet1!C52),FALSE))

or take it further and replace FALSE by 0

(POISSON(1,0.Half,0))*P0+
(POISSON(2,0.Half,0))*P0+
(POISSON(2,0.Half,0))*P0+
(POISSON(3,0.Half,0))*P0+
(POISSON(4,0.Half,0))*P0+
(POISSON(5,0.Half,0))*(POISSON(6,0.5*(C1-Sheet1!C52),0))+
(POISSON(7,0.Half,0))*P0+
(POISSON(2,0.Half,0))*(POISSON(1,0.5*(C1-Sheet1!C52),0))

--
HTH

Bob Phillips

(replace somewhere in email address with gmail if mailing direct)

"phil2006" wrote in
message ...

I have the following formula:

(POISSON(1,0.5*(C1+Sheet1!C52),FALSE))*(POISSON(0, 0.5*(C1-Sheet1!C52),FALSE)
)+(POISSON(2,0.5*(C1+Sheet1!C52),FALSE))*(POISSON( 0,0.5*(C1-Sheet1!C52),FALS
E))+(POISSON(2,0.5*(C1+Sheet1!C52),FALSE))*(POISSO N(0,0.5*(C1-Sheet1!C52),FA
LSE))+(POISSON(3,0.5*(C1+Sheet1!C52),FALSE))*(POIS SON(0,0.5*(C1-Sheet1!C52),
FALSE))+(POISSON(4,0.5*(C1+Sheet1!C52),FALSE))*(PO ISSON(0,0.5*(C1-Sheet1!C52
),FALSE))+(POISSON(5,0.5*(C1+Sheet1!C52),FALSE))*( POISSON(6,0.5*(C1-Sheet1!C
52),FALSE))+(POISSON(7,0.5*(C1+Sheet1!C52),FALSE)) *(POISSON(0,0.5*(C1-Sheet1
!C52),FALSE))+(POISSON(2,0.5*(C1+Sheet1!C52),FALSE ))*(POISSON(1,0.5*(C1-Shee
t1!C52),FALSE))


and need to add more, is there anyway I can reduce the size because i
am being told it is too long!

Thanks


--
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