On Oct 14, 2015, at 1:29 PM, Sherouk Moawad via R-help wrote:
> Σi=02 Σj=01(exp(xi+xj)), i>j if (i>0 and j>0) I want to write this
> summation which has a condition on numerator(j<i)i>0 and j>0I tried on this
> code
That comes across as only barely comprehensible.
> sum(sapply(0:2, function(i){sum(sapply(0:1, function(j){if
> (i>0&j>0){i>j}{exp(x[i]+x[j])}))}))But it didn't work Any help please
> [[alternative HTML version deleted]]
You should learn to post in plain text. This IS a plain text mailing list.
It is generally effective to include Boolean logic in the summand. Try this
untested modification:
sum(
sapply(0:2, function(i){ sum(
sapply(0:1, function(j){ (i>0)*(j>0)(i>j)*(exp(x[i]+x[j]) ))))
)
--
David Winsemius
Alameda, CA, USA
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