log (1-var) operation in C

Posted by heike on Stack Overflow See other posts from Stack Overflow or by heike
Published on 2012-03-30T17:26:32Z Indexed on 2012/03/30 17:28 UTC
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I am trying to code this algorithm. I am stuck in the part of log((1.0-u)/u))/beta; As I understand, I can not get the result of this in C, as it will always return me with negative value log (returning imaginary value). Tried to print the result of log(1-5) for instance, it gives me with Nan. How can I get the result of

double x = (alpha - log((1.0-u)/u))/beta

then?

Would appreciate for any pointers to solve this problem.

Thank you

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