about log2 for octave-3.1.51 (Not 3.1.50)

[Tatsuro MATSUOKA]

Hello


--- "John W. Eaton" <jwe at bevo.che.wisc.edu> wrote:

> Can you please find out where and how it is defined?  There is nothing
> in the Octave source code that #defines it.
> 
> | I think that the lines like the following will be required 
> | 
> | #ifndef HAVE_LOG2 
> | #define log2(x) xlog2(x)
> | #endif
> 
It is defined in math.h and

#define log2(x) (log (x) / M_LOG2_E)
 :
#define M_LOG2_E        0.693147180559945309417


Regards

Tatsuro

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