#8 log and other functions

[Dan McMahill]

Hello,

Any chance that you would consider adding the following:

more general use functions:

log() -- natural logarithm (i.e. log base e)
log10() -- log base 10
exp() -- exponentiation e^x

functions that would be specific to electrical engineering:
rip(a,b) = a*b/(a+b) = resistors in parallel formula (used this all the time on my HP before it died)
db10(x) = 10.0*log10(x) = convert a power ratio to decibels
db20(x) = 20.0*log10(x) = convert a voltage or current ratio to decibels

Thanks for making this calculator available! btw, I'm running on a Nokia 5310 Xpress Music with the nokia version of your program.

-Dan

[Goetz Schwandtner]

The log/exp functions are already there. In the menu try:

math/pow/ln -- for log with base e
math/pow/pow,2/log10 -- for log10()
math/pow/e^x -- for exp()

The other functions can easily be implemented as Calc programs (command mode/prog/new).

Please refer to the documentation on the website for details.