Generate a 2-dimensional array with random numbers

Question

Hoque 2018-9-24

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评论： Hoque 2018-9-24

I want to generate a 2-dimensional array with random numbers. * The first column would contain values from 5 to 1000 and the second column would contain values from 1 to 7.*

I generated a 2-dimensional array with random numbers, but not sure about the bold part of the above paragraph.

Y = 10

Z = 2

result = rand(Y,Z);

result(:,2:2:end) = result(:,2:2:end) .* result(:,2:2:end)

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Answer 1

Stephan 2018-9-24

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编辑：Stephan 2018-9-24

在 MATLAB Online 中打开

Hi,

does this help:

n = 100; % number of random numbers
A = zeros(n,2);
A(:,1)= randi(996,n,1)+4;
A(:,2)= randi(7,n,1)

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Stephan 2018-9-24

See edited answer... my mistake- I forgot to preallocate...

Hoque 2018-9-24

Thanks! :)

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Answer 2

Joel Meyer Espinoza 2018-9-24

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result(:,1)=randi([1 1000],1,10); result(:,2)=randi([1 7],1,10);

should work

it generates only int though the first parameters are the range of random numbers and the last two the size of the array

look here for more info

https://de.mathworks.com/help/matlab/math/random-integers.html

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Joel Meyer Espinoza 2018-9-24

make sure to hit enter after the first semicolon in the code

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