Center of mass - (wkpdia article)
april 2010 by jwh
"The center of mass \mathbf{R} of a system of particles is defined as the average of their positions, \mathbf{r}_i, weighted by their masses, mi:"
math
distance
metric
cluster
april 2010 by jwh
Mahalanobis distance - (wkpdia article)
april 2010 by jwh
"It differs from Euclidean distance in that it takes into account the correlations of the data set and is scale-invariant..."
math
distance
metric
april 2010 by jwh
Flickr: tactom's Photostream
february 2010 by jwh
some more folded stuff
design
math
art
paper
fold
pattern
february 2010 by jwh
Dempster–Shafer theory - (wkpdia article)
january 2010 by jwh
"The Dempster–Shafer theory (sometimes abbreviated to DST) is a mathematical theory of evidence[1]. It allows to combine evidence from different sources and arrive at a degree of belief (represented by a belief function) that takes into account all the available evidence."
belief
network
aggregation
math
january 2010 by jwh
Kendall tau distance - (wkpdia article)
november 2009 by jwh
"...metric that counts the number of pairwise disagreements between two lists. The larger the distance, the more dissimilar the two lists are."
statistics
list
metric
distance
math
november 2009 by jwh
[0804.2288] Parimutuel Betting on Permutations - 2008
november 2009 by jwh
"We focus on a permutation betting market under parimutuel call auction model where traders bet on the final ranking of n candidates. We present a Proportional Betting mechanism for this market. Our mechanism allows the traders to bet on any subset of the n x n 'candidate-rank' pairs, and rewards them proportionally to the number of pairs that appear in the final outcome."
math
theory
combinatorics
markets
november 2009 by jwh
Learning with Orderings
november 2009 by jwh
"A general and effective way to handle ordered sets of items is to assign each item a score computed from its features. Scoring effectively maps the items onto the real line or another Euclidean space, where standard learning algorithms and other operations apply. While this approach has often worked, we believe that much can be gained by directly building statistical models and learning algorithms on the discrete combinatorial spaces themselves. It is to forward this direction of research that we propose this workshop. " - workshop, heavy
math
ranking
uhh
whoa
machinelearning
statistics
conference
workshop
november 2009 by jwh
Analysis of N -card Le Her - 2002
june 2009 by jwh
"Abstract. We present a complete solution to a card game with historical origins. Our analysis exploits convexity properties in the payoff matrix, allowing this discrete game to be resolved by continuous methods."
analysis
math
game_theory
matrix
person
research
history
filetype:pdf
media:document
june 2009 by jwh
Foundations of electronic Marketplaces
june 2009 by jwh
Sandholm course syllabus with links to foundational papers
design
toread
course
_g
negotiation
onlinecourse
paper
research
person
university
math
june 2009 by jwh
Conditional expectation - (wkpdia article)
june 2009 by jwh
"In probability theory, a conditional expectation (also known as conditional expected value or conditional mean) is the expected value of a real random variable with respect to a conditional probability distribution."
math
_g
probability
june 2009 by jwh
Voronoi diagram - (wkpdia article)
april 2009 by jwh
"In the simplest case, we are given a set of points S in the plane, which are the Voronoi sites. Each site s has a Voronoi cell, also called a Dirichlet cell, V(s) consisting of all points closer to s than to any other site. The segments of the Voronoi diagram are all the points in the plane that are equidistant to two sites. The Voronoi nodes are the points equidistant to three (or more) sites."
visualization
tessellation
math
2d
april 2009 by jwh
CS171 Visualization ( online course )
march 2009 by jwh
thoughtful and extensive course from Harvard
math
data
statistics
learning
visualization
march 2009 by jwh
Overview — NetworkX v0.99 documentation
february 2009 by jwh
graph package for python
code
python
graph
math
interface
datastructure
data
february 2009 by jwh
Graph Theory - Diestel - 2005 - (433page PDF)
february 2009 by jwh
"...contains all the standard basic material to be taught in a first undergraduate course, complete with detailed proofs and numerous illustrations."
book
graph
theory
math
pdf
toread
filetype:pdf
media:document
february 2009 by jwh
Hypergraph - (wpdia article)
february 2009 by jwh
"...a generalization of a graph, where edges can connect any number of vertices."
math
path
navigation
history
browser
interface
datastructure
data
february 2009 by jwh
Graph (mathematics) - (wkpdia article)
february 2009 by jwh
"In mathematics a graph is an abstract representation of a set of objects where some pairs of the objects are connected by links."
reference
math
graph
visualization
adjacency
interface
february 2009 by jwh
Generalized Mediant
december 2008 by jwh
"A fraction is an ordered pair of real numbers, whereas a ratio is a single real number."
math
reference
december 2008 by jwh
The Interpretation of Interaction in Contingency Tables E. H. Simpson - 1951
december 2008 by jwh
.pdf - original description of Simpson's paradox - "A common example of the paradox involves batting averages in baseball: it is possible for one player to hit for a higher batting average than another player during a given year, and to do so again during the next year, but to have a lower batting average when the two years are combined."
math
statistics
filetype:pdf
media:document
december 2008 by jwh
Inductive inference - (math wkpdia article)
september 2008 by jwh
"Given a class S of computable functions, is there a learner (that is, recursive functional) which outputs for any input of the form (f(0),f(1),...,f(n)) a hypothesis. A learner M learns a function f if almost all hypotheses are the same index e of f with respect to a previously agreed on acceptable numbering of all computable functions; M learns S if M learns every f in S. Basic results are that all recursively enumerable classes of functions are learnable while the class REC of all computable functions is not learnable."
math
theory
person
1960
september 2008 by jwh
Parallel coordinates - (wkpdia page)
august 2008 by jwh
description of high dimension visualization method
visualization
math
graph
graphics
august 2008 by jwh
Convex Optimization – Boyd and Vandenberghe
june 2008 by jwh
730 p. book in .pdf form
book
algorithm
optimization
math
mathematics
june 2008 by jwh
Website Morphing - 2008
june 2008 by jwh
website use adaptation paper. yawn. .pdf
research
paper
adaptation
statistics
math
filetype:pdf
media:document
june 2008 by jwh
Jaccard similarity coefficient - (wkpdia article)
may 2008 by jwh
similarity using overlapping occurrences not absences
attributes
binary
math
may 2008 by jwh
Computing Optimal Attribute Weight Settings for Nearest NeighborAlgorithms - 1997
may 2008 by jwh
2d sample of 1 nearest neighbor weight calc with review of prior weight calc methods (.pdf)
math
mathematics
filetype:pdf
media:document
may 2008 by jwh
EE4253 Online Hamming Code Tool
may 2008 by jwh
hamming distance illustration
programming
code
distance
math
may 2008 by jwh
Distance - (wkpdia article)
may 2008 by jwh
"...the Minkowski distance of order p (p-norm distance) is defined as:"
math
mathematics
distance
may 2008 by jwh
Producer Price Index Overview (.pdf)
may 2008 by jwh
history and composition
math
statistics
government
hedonic
metric
filetype:pdf
media:document
may 2008 by jwh
Consumer Price Index Overview (.pdf)
may 2008 by jwh
history and composition
math
research
government
metric
hedonic
filetype:pdf
media:document
may 2008 by jwh
Talking About a Revolution - By Paul Krugman
may 2008 by jwh
reflection on Kevin Lancaster contributions-"useful theorizing...is always a matter of choosing the right strategic simplification...it seemed that the clarity of constant-returns/perfect-competition analysis justified its violence to reality."
statistics
economics
math
mathematics
hedonic
pricing
auction
may 2008 by jwh
Hedonic regression - (wkpdia article)
may 2008 by jwh
"...method of estimating demand or value. It decomposes the item being researched into its constituent characteristics, and obtains estimates of the contributory value of each characteristic."
economics
mathematics
regression
model
math
reference
may 2008 by jwh
Investigating Overbidders in Online Art Auctions Using a Bilinear Mixed Model - SRINIVAS K. REDDY et al 2007
may 2008 by jwh
"...demonstrate an application of a bilinear mixed model for a complex human behavior such as overbidding in auctions..." last download link works
auction
math
social
mathematics
research
recent
may 2008 by jwh
IDEAS: Journal of Artificial Societies and Social Simulation, Journal of Artificial Societies and Social Simulation
may 2008 by jwh
straightforward list of simulation docs
simulation
math
social
may 2008 by jwh
Scalable Data Space Partitioning In High Dimension - Johnson, Dasu - 1999
april 2008 by jwh
DataSphere theory. page has link to .pdf file
paper
datamining
subset
data
math
mathematics
statistics
april 2008 by jwh
The random Tukey depth - J.A. Cuesta-Albertos and A. Nieto-Reyes - Feb 2008
april 2008 by jwh
"...computation of the Tukey depth, also called halfspace depth, is very demanding, even in low dimensional spaces, because it requires the consideration of all possible one-dimensional projections..."
pdf
paper
research
math
mathematics
statistics
person
tukey
april 2008 by jwh
Statistics 503 - Exploratory Methods and Data Mining
april 2008 by jwh
taught by ggobi co-creator
statistics
datamining
exploration
data
math
mathematics
april 2008 by jwh
An Intuitive Explanation of Bayesian Reasoning
april 2008 by jwh
interactive visualizations
analysis
statistics
math
mathematics
probability
reference
tutorial
april 2008 by jwh
Lawrence Philips' Metaphone Algorithm
april 2008 by jwh
"Lawrence Philips' Metaphone Algorithm is an algorithm which returns the rough approximation of how an English word sounds."
algorithm
language
programming
reference
string
audio
phonetics
linquistics
person
math
april 2008 by jwh
gnuplot homepage
march 2008 by jwh
graphing documentation
math
mathematics
visualization
graphing
reference
graphics
perl
sofware
statistics
march 2008 by jwh
The R-Perl Interface
march 2008 by jwh
"...interface for calling R from Perl and Perl from R..."
language
perl
math
r
software
statistics
tool
interface
march 2008 by jwh
George E. P. Box - (wkpdia article)
march 2008 by jwh
"...pioneer in the areas of quality control, time series analysis, design of experiments and Bayesian inference."
statistics
probability
math
person
research
march 2008 by jwh
e-EDGE Web Edition
february 2008 by jwh
public global economy analysis by Los Angeles County Economic Development Corporation
analysis
public
forecasting
math
data
statistics
economics
february 2008 by jwh
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