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what is the problem when running the code 2 times?

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Good mind
Good mind 2017-12-30
评论： Jan 2017-12-31
when i run my code i get the results(for example values of snr and mse), but when i run second time the same code and without changing any thing i get another results with the difference of 1,.. or 0.5 and so on. what is the problem?
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Jan
Jan 2017-12-31
Maybe a rand() inside the code? Or is it a script and you forgot to initialize a variable? How could we know without seeing the code?

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