rand in matrix?

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Anne Nguyen 2019-10-15

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评论： KALYAN ACHARJYA 2019-10-15

Is it possible to use rand in a matrix and include a range? I know it is possible with a vector, but I wanted to see if it was possible in a matrix. Thank you!

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Answer 1

KALYAN ACHARJYA 2019-10-15

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编辑：KALYAN ACHARJYA 2019-10-15

result=-min_value + (max_value+min_value)*rand(m,n);

Example:

%Let say range -0.6 to 0.8 and matrix size 5x4
result=-0.6 + (0.8+0.6)*rand(5,4)

Result:

result =
    0.1382   -0.0979    0.2944    0.0736
   -0.4558    0.2558   -0.1577   -0.5351
    0.0320    0.5944   -0.4910    0.1707
   -0.1773    0.5954   -0.5836   -0.1201
    0.2625    0.1651    0.2922   -0.5717

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Walter Roberson 2019-10-15

I would typically write

result = min_value + (max_value - min_value) * rand(m,n);

In my formula, greater rand() value corresponds to greater result. In the formula KAYLAN posted, greater rand() value corresponds to lower result. Mathematically they are the same, but I think the form I presented is easier to understand.