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  HyPhy message board › Methodology Questions › How to › Calculate Log(not base e) of a number
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Calculate Log(not base e) of a number (Read 11983 times)
hyphyInfant
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Calculate Log(not base e) of a number
Jun 3rd, 2014 at 12:48pm  
Hello,

     I need to calculate the Log (base j) of a number where j is not e but have no idea how to do this. I will appreciate if anyone could please assist.

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Steven
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Re: Calculate Log(not base e) of a number
Reply #1 - Jun 3rd, 2014 at 1:29pm  
Hello hyphyinfant,

Please take a look at wikipedia's list of logarithmic identities, specifically, "changing the base".

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In hyphy, you can test this by issuing the statement:
fprintf(stdout, Log(100)/Log(10));

Thanks,
Steven
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