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Random number between 0 and the value of another variable

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SY
SY 2017-12-31
评论： SY 2017-12-31
Hello, Is there an easy way for me to set the value of a one variable as a restriction when generating a random number? Specifically, what I want to do is:
1. "p" is generated as a random number between 0 and 1
2. Generate another variable "q", but there is a restriction that p+q < 1. Since I determined the value of p in the previous step, I'd like q to be something like rand(1-p), but obviously the rand function requires that size inputs must be integers.
Is there a clever way to do this? What I've thought of is making an if statement to check that p + q < 1 before proceeding to the next steps of the code (and repeat the rand function if q happens to be too large), but I thought there may be a simpler solution.
Thanks!
SY

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James Tursa
James Tursa 2017-12-31
q = rand*(1-p);
  1 个评论
SY
SY 2017-12-31
My goodness, it was this simple! Can't believe all I had forgotten was the * sign this entire time. Thanks very much!
SY

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ANKUR KUMAR
ANKUR KUMAR 2017-12-31
As per my knowledge, there is no any predefined function which do your work. You can write the script as well or you can write function for your convenience.
clc
clear
A=rand(5)
[x y]=find(A>0.5);
while length(x)>0
for i=1:length(x)
A(x(i),y(i))=rand(1);
end
[x y]=find(A>0.5);
end
A

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