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Thread: real world example

  1. January 9th 2012, 11:45 AM #1
    delgeezee
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    real world example of log

    What is a real world example of a logarithm?
    Last edited by delgeezee; January 9th 2012 at 12:03 PM.
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  2. January 9th 2012, 12:03 PM #2
    chisigma
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    Re: real world example of log

    Quote Originally Posted by delgeezee View Post
    What is a real world example of a log function?
    A basic concept in Information Theory is the Entropy os a random variable. Given a random variable X with alphabet \chi= \{1,2,...,m\} , the the Entropy of X is ...

    H(X)= - \sum_{x \in \chi} p(x)\ \ln p(x) (1)

    ... where p(x)=P\{X=x\}...

    Kind regards

    \chi \sigma
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  3. January 9th 2012, 12:06 PM #3
    Charney
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    Re: real world example of log

    Google is your friend. As it turns out, Wikipedia is packed full of valid real-world applications of logarithms. See this link.
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