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The predictability of letters in written english (0710.4516v2)
Published 24 Oct 2007 in physics.soc-ph, cs.CL, and stat.ML
Abstract: We show that the predictability of letters in written English texts depends strongly on their position in the word. The first letters are usually the least easy to predict. This agrees with the intuitive notion that words are well defined subunits in written languages, with much weaker correlations across these units than within them. It implies that the average entropy of a letter deep inside a word is roughly 4 times smaller than the entropy of the first letter.