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base of a logarithmic functiondoes anyone know how to change the base of a log function using math expression? i'm having the same challenge in grapher.app, when trying to visualize a function. More like this

Logarithm of X on base B equals logarithm of X on base C divided by logarithm of B on base C Is this helpful?
Getting , say Log 12 of 16.
Gives you a variable based logarithm.
See attached JavaScript QC  thanks to Brian Risk for this nifty piece of scripting which I ported to the JS patch [original in comments area] , also contains an example Math Expression patch implimentation too.
Hope that helps .