Prob Matrix for binary sequence

1 vue (au cours des 30 derniers jours)
xplore29
xplore29 le 14 Mar 2013
for some integer 'n', I have a matrix M of size (2^n) x n containing all possible binary sequences. Another vector N of length 'n' that contains the probabilities of bit being zero. I want to compute the prob of each sequence without using for loops.
Example
n=2;
M = [0 0;0 1;1 0;1 1];
N = [Prob(N1=0)=0.3 Prob(N2=0)=0.2]
Prob(M1M2=00) = (0.3)*(0.2)
Prob(M1M2=01) = (0.3)*(1-0.2)
Prob(M1M2=10) = (1-0.3)*(0.2)
Prob(M1M2=11) = (1-0.3)*(1-0.2)

Réponses (1)

Matt J
Matt J le 15 Mar 2013
Probabilities = prod(bsxfun(@times,M,1-N) +bsxfun(@times,~M,N),2);
  3 commentaires
Matt J
Matt J le 15 Mar 2013
Modifié(e) : Matt J le 15 Mar 2013
Not for me. I get the correct values.
>> M = [0 0;0 1;1 0;1 1];N=[0.3,0.2]; Probabilities = prod(bsxfun(@times,M,1-N) +bsxfun(@times,~M,N),2)
Probabilities =
0.0600
0.2400
0.1400
0.5600
Walter Roberson
Walter Roberson le 15 Mar 2013
Note that the character before the M is the tilde, not subtraction.

Connectez-vous pour commenter.

Catégories

En savoir plus sur Creating and Concatenating Matrices dans Help Center et File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by