Generate N observations from a uniform distribution on [0,1] and compare it to a threshold

1 回表示 (過去 30 日間)
We simulate this experiment by generating a logical array of
length N, with 1 (true) for "heads" and 0 (false) for "tails".
The problem is to generate the right number of 1s and 0s, so that
the percentage of 1s is p (60%). We shall do so in two ways.
N=1000; // number of coin tosses
p=0.6; // bias: percentage of 1s in the array
Method 1
Generate N observations from a uniform distribution on [0,1].
Threshold these observations at p. The resulting logical array
will have
1 if an observation was < p,
0 otherwise.
  4 件のコメント
Ayman Alotaibi
Ayman Alotaibi 2018 年 3 月 10 日
percentageOfOnes = p;
numberOfOnes = (N * percentageOfOnes );
signal = [ones(1, numberOfOnes), zeros(1, N - numberOfOnes)]; signal = signal(randperm(length(signal))); numOnes = sum(signal);
Ayman Alotaibi
Ayman Alotaibi 2018 年 3 月 10 日
but this only gives u sum of ones, how can I have two signal with sum all ones, and sum all zeros

サインインしてコメントする。

採用された回答

Roger Stafford
Roger Stafford 2018 年 3 月 10 日
Here's another way. Let there be N1 trues and N0 falses.
x = [repmat(true,1,N1),repmat(false,1,N0)];
x = x(randperm(N1+N0));
  4 件のコメント
Ayman Alotaibi
Ayman Alotaibi 2018 年 3 月 10 日
can I get the sum of zeros too ? like numZeros, so it gives 40? or should I do numOnes - X ?
Ayman Alotaibi
Ayman Alotaibi 2018 年 3 月 10 日
I did this code at the bottom of code, and it worked
numZeros = length(zeros(1, N - numberOfOnes)) ;

サインインしてコメントする。

その他の回答 (0 件)

カテゴリ

Help Center および File ExchangeOctave についてさらに検索

Community Treasure Hunt

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

Start Hunting!

Translated by