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zero value in beronoulli trials !!!

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reem
reem 2011-4-10
Hi sir,I want to know,why some values in my program equal to zero
This is my program
N=10;
P=0.5;
for K=0:N;
format long e
M =exp((P)^K*((1-P)^N-K)*(factorial(N)/factorial(K)*factorial(N-K)))
display(M)
end
Thanks in advance

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采纳的回答

Andrew Newell
Andrew Newell 2011-4-10
The correct expression is
M =P.^K.*(1-P).^(N-K).*factorial(N)./(factorial(K).*factorial(N-K))
If you have the Statistics Toolbox, you can confirm that this gives the same output as
binopdf(0:N,N,P)
  1 个评论
reem
reem 2011-4-10
Thank you so so much Oleg and Andrew
I will not forget your help forever
Kind regards

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更多回答（2 个）

Oleg Komarov
Oleg Komarov 2011-4-10
Some other parenthesis mistakes corrected:
N=10;
P=0.5;
K=0:N;
M =exp(P.^K.*(1-P).^(N-K).*factorial(N)./(factorial(K).*factorial(N-K)))
bym
bym 2011-4-10
I think you want N!/(K!*(N-K)!)<--note parentheses
  1 个评论
reem
reem 2011-4-10
Yes I want that,so what is the problem here in my program

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