1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Logarithmic calibration

  1. Sep 21, 2005 #1
    Hello All,

    I have a very impotant question for you. Any help is appreciated.

    Given is a logarithmical function: y = log2x (2 is the base) and the y value is known.
    I have to find out what is the x value in the fewest steps possible. It can be made by giving sample values for x and applying to the function, but the performance (timing) is a key value, so the process must be very quick. The known solution is to split the curve to lines and shrink the range of possibilities.

    Later on I have to translate the solution into C++ and apply it for calibration.

    Many thanks in advance for your help!
  2. jcsd
  3. Sep 22, 2005 #2


    User Avatar
    Science Advisor
    Homework Helper

    Are you constrained to solving the problem by iteration? You could just write [itex]x=2^y[/itex] and use the built-in functions.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook