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Excel -- random number... either -1 or 1

Posted on 2013-12-16
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Last Modified: 2013-12-17
Experts:

I need a random number function that gives me only two values:  -1 or 1

Below rand function also generates three values: -1, 0, 1  

=RAND()*((-1)^INT(RAND()*10))

How should this function to be modified to only get -1 and 1?

EEH
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Question by:ExpExchHelp
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4 Comments
 
LVL 34

Accepted Solution

by:
Norie earned 500 total points
ID: 39721760
You could try this.

=IF(RAND()>0.5, -1, 1)
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Author Closing Comment

by:ExpExchHelp
ID: 39721763
Awesome... thanks for the prompt response!

EEH
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LVL 43

Expert Comment

by:Saqib Husain, Syed
ID: 39721820
Another option although the question is closed

=2*INT(RAND()*2)-1
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Author Comment

by:ExpExchHelp
ID: 39724208
ssaqibh -- thanks!
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