python Programming Glossary: weighting

Implementing Bag-of-Words Naive-Bayes classifier in NLTK

http://stackoverflow.com/questions/10098533/implementing-bag-of-words-naive-bayes-classifier-in-nltk

docs here's a somewhat complicated one that does TF IDF weighting chooses the 1000 best features based on a chi2 statistic and..

How to calculate cosine similarity given 2 sentence strings? - Python

http://stackoverflow.com/questions/15173225/how-to-calculate-cosine-similarity-given-2-sentence-strings-python

used here is described here . This does not include weighting of the words by tf idf but in order to use tf idf you need to..

My own OCR-program in Python

http://stackoverflow.com/questions/1989987/my-own-ocr-program-in-python

the 30 parts of the letter with all model letters #make a weighting #print letter im.save D Python26 PYTHON PROGRAMME bild2.jpg..

Inverse Distance Weighted (IDW) Interpolation with Python

http://stackoverflow.com/questions/3104781/inverse-distance-weighted-idw-interpolation-with-python

20 Oct this class Invdisttree combines inverse distance weighting and scipy.spatial.KDTree . Forget the original brute force answer.. points have areas ~ distance 2 so p 2 is inverse area weighting. For example z1 area1 z2 area2 z3 area3 1 area1 1 area2 1 area3.. for distances 1 2 3 Similarly in 3d p 3 is inverse volume weighting. Scaling if different X coordinates measure different things..

Interpolation over an irregular grid

http://stackoverflow.com/questions/3242382/interpolation-over-an-irregular-grid

this question Try the combination of inverse distance weighting and scipy.spatial.KDTree described in SO inverse distance weighted.. . Kd trees work nicely in 2d 3d ... inverse distance weighting is smooth and local and the k number of nearest neighbours can..

selection based on percentage weighting

http://stackoverflow.com/questions/3655430/selection-based-on-percentage-weighting

based on percentage weighting I have a set of values and an associated percentage for each..

Non biased return a list of n random positive numbers (>=0) so that their sum == total_sum

http://stackoverflow.com/questions/3959021/non-biased-return-a-list-of-n-random-positive-numbers-0-so-that-their-sum

of Octave can't. It is best to use an orthonormal weighting matrix W see my other answer with one vector 1 1 1 sqrt 3 ... 0 0 and b b b are on the cube's diagonal. The orthonormal weighting matrix W allows us to generate points that are uniformly distributed.. to a hypercube's main diagonal Precalculate a weighting matrix W of rank N. Generate independent random variables u..

How to approach number guessing game(with a twist) algorithm?

http://stackoverflow.com/questions/7694978/how-to-approach-number-guessing-gamewith-a-twist-algorithm

tracks the changes in fruit prices as well as total sum weighting the last data point the heaviest . I'm not sure how to apply..