John R Pierce wrote: > Entropy has a standard meaning in computer science, see > http://en.wikipedia.org/wiki/Information_entropy for an introductory > discussion with various references. Shannon entropy only makes sense when applied to a random variable. It cannot be applied to a single string, as in this case. Algorithmic entropy (Kolmogorov complexity) can be applied to a single string, but it cannot be measured directly. -- Timothy Murphy e-mail: gayleard /at/ eircom.net School of Mathematics, Trinity College, Dublin 2, Ireland