> data(quakes)> head(quakes) lat long depth mag stations 1 -20.42 181.62 562 4.8 41 2 -20.62 181.03 650 4.2 15 3 -26.00 184.10 42 5.4 43 4 -17.97 181.66 626 4.1 19 5 -20.42 181.96 649 4.0 11 6 -19.68 … Continue reading
deCordova by Boston « Threading In The Choirs, via nullscapes (Source: http://mllr.wordpress.com/2011/08/26/boston/)
Given a time-series of one security’s price-train P[t], a low-frequency trader’s job (forgetting trading costs) is to find a step function S[t] to convolve against price changes P′[t] with the proviso that the other side to the trade exists. S[t] represents the bet … Continue reading
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Tagged bet sizing, Brownian ratchet, convolution, economics, finance, financial economics, financial engineering, functional analysis, functionals, integrals, integration, Kelly rule, liquidity, macroeconomics, mathematics, monkey style trading, profit, risk metrics, trading, welfare economics
Land Erodes, Weather Systems Shift, Volcanoes Erupt, Fires Sweep Through Forests, and Storms Leave Behind Drastic Change to the Earth’s Surface by Hollis Brown Thornton
This gallery contains 6 photos.
data from the US Drug Enforcement Agency’s System To Retrieve Information on Drug Evidence A few points about these pictures which I’ll be elaborating on in future posts: sub i, sub j: There is significant variation from city to city and presumably dealer … Continue reading
Tagged cocaine, crack, crime, criminology, data, data collection, DEA, drugs, economics, epistemology, facts, marijuana, measurement, methamphetamine, narcotics, police, price, purity, science, skepticism, sociology, statistics, sub i sub j, variation
Dark Eyes covered by The Dirty Projectors
Sacer by Gang Gang Dance (Source: http://www.youtube.com/)
OKCupid is using the wrong mathematics to match potential dates together. But before I critique them, let me compliment them on what they’re doing right: “Our” mutual score is the geometric average of your score of me, and my score … Continue reading
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Tagged analytics, approval voting, assessment, computers, crowdsourcing, dating, dating websites, functionals, grade, grading, human mathematics, humans, internet, internet dating, love, mathematical modelling, mathematics, OKCupid, online dating, order theory, ordering, partially ordered set, political economy, poset, posets, rank, ranking, relationships, romance, score
fatherfigurine: Found in a gas station parking lot Pt. 2 Part one is here.