antilog

Antilog, as in exponentiation? Try exp().

well i mean if you had a function like... antilog( float x ), then it would do 10 or e to the power of x and then return the number. I tried the exp( ) but it didn''t come out with the right number though.

Also how would you do log with different bases?? ie log base 2?

[~aussie]

Well if you want to do 10^x then just use pow( ), exp( ) will give you e^x.

quote:

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Also how would you do log with different bases?? ie log base 2?

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Log_ab = ln b / ln a or Log_ab = lg b / lg a where lg is the log in base 10.

[edit]Flicking through some c math libary docs there's a log2( ) function (log in base 2) and there's also a pow10( ) function (which will give you 10^x)

[edited by - Monder on June 12, 2004 9:25:15 AM]

a^x = exp(ln(a^x)) = exp(x * ln(a))

This is so simple