1. ## real world example of log

What is a real world example of a logarithm?

2. ## Re: real world example of log

Originally Posted by delgeezee
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 $\displaystyle \chi= \{1,2,...,m\}$ , the the Entropy of X is ...

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

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

Kind regards

$\displaystyle \chi$ $\displaystyle \sigma$

3. ## 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.