Fixed values of randn at starting?

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Hema Aggarwal
Hema Aggarwal 2017-3-3
回答： Guillaume 2017-3-3
I am using 'randn' function but on every run values is keep changing,how can i fixed that?
  1 个评论
KSSV
KSSV 2017-3-3
The purpose of randn is to generate Normally distributed random numbers. It keeps changing for every call. Read the documentation.

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回答（1 个）

Guillaume
Guillaume 2017-3-3
If you want to have the same stream of random numbers every time you run your code, simply set the seed of the random generator to a constant value of your choice, using rng
>>rng(1234); %choose whatever number you want
>>randn(1, 2)
ans =
-0.947246643957371 0.540149747070348
>>randn(1, 2)
ans =
-0.216602140976276 1.18903197494834
>>%...later
>>rng(1234); %same seed as before, produces the same sequence
>>randn(1, 2)
ans =
-0.947246643957371 0.540149747070348
>>randn(1, 2)
ans =
-0.216602140976276 1.18903197494834

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