How to make a random vector in Matlab as a ones and zeros but under control?

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Hamid Reza Barzegar
Hamid Reza Barzegar 2015-11-11
评论： Hamid Reza Barzegar 2015-11-11
How to make a random vector in Matlab as a ones and zeros with this condition, that the number of ones be under my control. which it means i want the random vector with fix number of ones but totally random in positions. for example: this line will make a random number 0 and 1 also it's totally random in the vector but i cannot control number of 1 and 0 e.g i need number of 1 be 90 and the rest 0 or any other number V1=round(rand(1,256));

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Thorsten
Thorsten 2015-11-11
r = zeros(1,256);
r(randperm(256, 90)) = 1;

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