I actually just ended up doing something like

ds1,UN,ds2,UN,+,2,EQ,NAN,total,IF

Worked well


Sent from my iPhone

On Mar 31, 2008, at 11:34 AM, Simon Hobson <[EMAIL PROTECTED]>  
wrote:

> Alex van den Bogaerdt wrote:
>
>>> Hmm, looking at the doc pages it doesn't look like boolean operators
>>> (AND, OR) are provided,
>>
>> er...
>>
>> FALSE==0
>> TRUE==1  (in reality: TRUE==anything but 0)
>>
>>          \
>> x     y   \   +      *
>> ------------+--------------
>> FALSE FALSE | FALSE  FALSE
>> FALSE TRUE  | TRUE   FALSE
>> TRUE  FALSE | TRUE   FALSE
>> TRUE  TRUE  | TRUE   TRUE
>>
>> If you want: if (x and y) then B else C:
>>
>> then use CDEF:   x,y,*,B,C,IF
>
>
> Doh, so obvious when it's pointed out !
>
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