Prob Matrix for binary sequence
显示 更早的评论
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)
回答（1 个）
Matt J
2013-3-15
Probabilities = prod(bsxfun(@times,M,1-N) +bsxfun(@times,~M,N),2);
3 个评论
xplore29
2013-3-15
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
2013-3-15
Note that the character before the M is the tilde, not subtraction.
类别
在 帮助中心 和 File Exchange 中查找有关 Operating on Diagonal Matrices 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
