algorithmsanalyzed.blogspot.com
Algorithm Analysis: BellKor Algorithm: Neighborhood Based Approach
http://algorithmsanalyzed.blogspot.com/2008/03/bellkor-algorithm-neighborhood-based_06.html
Thursday, March 6, 2008. BellKor Algorithm: Neighborhood Based Approach. The content that follows is taken from Robert M. Bell and Yehuda Koren's article "Improved Neighborhood-based Collaborative Filtering.". This article is cited as the reference for the Neighborhood-based approach used in the BellKor algorithm. The Neighborhood-based algorithm as described by the BellKor team has three major steps:. For the probe data, predicting movie ratings based solely on the mean results in an RMSE. Nearest neigh...
uxstats.blogspot.com
UxD Stats: Calculating correlation co-efficients
http://uxstats.blogspot.com/2008/01/calculating-correlation-co-efficients.html
A series of articles on statistics and the application of statistical analysis to the variety of user research methods used by Information Architects, Usability consultants, and miscellaneous other user experience practitioners. Thursday, January 17, 2008. The correlation co-efficient, r, for a set of (x,y) data pairs is calculated as follows:. The following steps can be followed:. Calculate the average values for both x (x*) and y (y*);. For each row, calculate (x – x*) and (y – y*);. Y – y*). In the ab...
minchechiu.blogspot.com
Michael's Blog: How to let tesseract (OCR) to only recognize "Digits" ?
http://minchechiu.blogspot.com/2010/05/how-to-let-tesseract-ocr-to-only.html
Michael(Min-Che, Chiu)'s personal blog, about programming, funny things . Monday, May 3, 2010. How to let tesseract (OCR) to only recognize "Digits"? Recently, I am playing around the OCR(Optical character recognition). Http:/ en.wikipedia.org/wiki/Optical character recognition. Environment : Ubuntu 8.04. 1Add a file (digit) to /usr/local/share/tessdata/configs/. File content : tessedit char whitelist 0123456789. 3Change your tesseract command as below. Tesseract /image.tif /output nobatch digits. Subscr...