
Dear all,

I would be grateful if anyone can help me with the following:

My aim is to compute explicitely the sum S=A+B where A=sum(exp(c_i/d)),
i=1,...,n;
B, c_i, and d are real numbers with -Inf<B,c_i<+Inf; and d>0.
The problem is that when c_i/d >710 (for some i) R is setting
exp(c_i/d) to be equal to +Inf and hence the whole summation S.
So in simple cases where for example c_i=8 (for some i), and d=0.01 the
whole summation is turning out to be infinite.
Is there a way to get round that in R?
Can anyone suggest any computational trick to calculate S when c_i/d>710
(for some i)?

Any suggestions would be much appreciated.

Regards,

Amy





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