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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


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    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.
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