Generate random sequence of 1's and -1's in matlab

1. Generate random sequence of 1's and -1's in matlab

How do i generate a random sequence of 1's and minus -1's in matlab with mean 0?  Reply With Quote

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2. Re: Generate random sequence of 1's and -1's in matlab

Code:
```x0 = 1:40;
y0 = 2*int32( randn( size(x0) ) >= 0.0 ) - 1;```  Reply With Quote

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3. Re: Generate random sequence of 1's and -1's in matlab

This doesnt always give a mean of zero  Reply With Quote

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4. Re: generate random 1's and -1's in matlab

the rand function generates uniformly distributed random numbers

if you tell it to generate random numbers between 0 and 1,
you can convert those less than 0.5 to -1 and those greater than 0.5 to 1  Reply With Quote

5. Re: Generate random sequence of 1's and -1's in matlab

This doesnt always give a mean of zero
By nature of random distribution, an arbitrary selected sample can't have exactly zero mean otherwise it's not random.

You may want to specify additional properties of the random distribution, e.g. maximal imbalance for a given sample length.  Reply With Quote

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6. Re: Generate random sequence of 1's and -1's in matlab Originally Posted by Chinmaye This doesnt always give a mean of zero
If length of random sequence is enough large, average is zero.  Reply With Quote

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