Random Number Generation
Random Number Generation
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There are four basic fundamental random number functions available in MATLAB: rand, randi, randn, and randperm.
The rand function returns real numbers between 0 and 1 that are drawn from a uniform distribution in MATLAB. For example,
r1 = rand(1000,1);
r1 is a 1000-by-1 column vector containing real floating-point numbers drawn from a uniform distribution. All the values in r1 are in the open interval (0, 1). Histogram of these values is show roughly flat nature, which indicates a fairly uniform sampling of numbers.
The randi function gives back double integer values drawn from a discrete uniform distribution.
r2 = randi(10,1000,1);
r2 is a 1000-by-1 column vector containing integer values drawn from a discrete uniform distribution whose range is 1,2,…,10. A histogram of these values is also turnout to be roughly flat in nature, which indicates a fairly uniform sampling of integers between 1 and 10.
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