How do I generate a random number between two numbers, "n" number of times?

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Uriel Clark
Uriel Clark on 18 Oct 2016
Answered: Matthew Eicholtz on 18 Oct 2016
I need to generate a random number that is between two other numbers and this will be looped "n" number of times in a "for" loop.

Answers (2)

Matthew Eicholtz
Matthew Eicholtz on 18 Oct 2016
Without using a for-loop:
a = 0;
b = 255;
n = 1000;
x = a + (b-a).*rand(n,1);
will generate n numbers randomly from the interval [a,b]. You could do this with a for-loop as well, but it is unecessary:
x = zeros(n,1);
for ii=1:n
x(ii) = a + (b-a).*rand;
end

Geoff Hayes
Geoff Hayes on 18 Oct 2016
Uriel - see rand and in particular the Random Numbers Within Specified Interval example. You could create an array of n elements and then populate each element (as you iterate in your for loop) with the random number as per the example.

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