# How to generate sample Randomly in Matlab

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Med Future el 3 de Mzo. de 2022
Comentada: Walter Roberson el 3 de Mzo. de 2022
Hello everyone i hope you are doing well.
I have the following code which generate 4000 sample for a value of 200. and output is the if 1x4000
I want the value to be random from 1 to 1000. and save the result of each value in seperate row
for example value=1 it has 4000 samples in first row, after value=100 it has 4000 samples in second row
value= [200];
Numberofsample = [4000];
output = repmat(value,1,(ceil(sum(Numberofsample)/length(Numberofsample))));
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### Respuestas (1)

Benjamin Thompson el 3 de Mzo. de 2022
>> output = randn(1,4000);
>> size(output)
ans =
1 4000
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Med Future el 3 de Mzo. de 2022
@Walter Roberson Thanks for the answer.
I have to generate the data for other classes as well. Can i post another question?
Walter Roberson el 3 de Mzo. de 2022
The method remains the same. Take one random quantity for each "value" and repeat it out to the 4000 or whatever you need.
If the class data is quantized, then you can use a random integer in the range of 1 to the number of quantized values, and use that to index the original data, like
output = repmat( MyCategories(randi(length(MyCategories), length(value), 1), 1, NumberOfCopies);

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