Simplegoodturing Save

This module provides an implementation of Gale and Sampson's (1995/2001) "Simple Good Turing" algorithm. The main function is simpleGoodTuringProbs(), which takes a dictionary of species counts and returns the estimated population frequencies of the species, as estimated by the Simple Good Turing method. To use this module, you must have scipy and numpy installed.

Also included is a function that uses pylab and matplotlib to draw a useful scatterplot for comparing the empirical frequencies against the Simple Good Turing estimates.

Depends on reasonably recent versions of scipy and numpy.

Version 0.3: June 21, 2011 First github version.

Version 0.2: November 12, 2009. Added version string. Added check for 0 counts. Don't pollute namespace with "import *". Added loglog keyword argument to plotFreqVsGoodTuring(). Version 0.1: November 11, 2009.

REFERENCES: William Gale and Geoffrey Sampson. 1995. Good-Turing frequency estimation without tears. Journal of Quantitative Linguistics, vol. 2, pp. 217--37.

See also the corrected reprint of same on Sampson's web site.