A question about for loop

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Mnr 2014-12-22

回答： Azzi Abdelmalek 2014-12-22

Hello all,

I have a vector p=[.5 .7 .2]; I have a quantity d that is equal to (1-p(1))*(1-p(2))*p(3)+(1-p(1))*p(2)*(1-p(3))+p(1)*(1-p(2))*(1-p(3))

Can anybody tell me how I can use for loop to get d instead of writing the formula of that?

Thanks.

Azzi Abdelmalek 2014-12-22

p=[.5 .7 .2];
idx=nchoosek(1:3,2) 
out=0;
for k=1:size(idx,1)
   m=setdiff(1:3,idx(k,:));
   out=out+p(m)*(1-p(idx(k,1)))*(1-p(idx(k,2)))
end

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