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SUMMARY:Multidimensional scaling - Andor Vari-Kakas\, Churchill College
DTSTART:20201028T193000Z
DTEND:20201028T200000Z
UID:TALK153544@talks.cam.ac.uk
CONTACT:Matthew Ireland
DESCRIPTION:Human beings are much better in comparing two items than in qu
 antifying them individually. So\, can\nwe arrange the items in the space a
 ccording to their observed pairwise differences? And how many\ndimensions 
 do we need? Can we interpret the axes of the resulting coordinate system?\
 nTo answer these questions\, we will first look at the underlying linear a
 lgebra to derive Torgerson-\nscaling\, then we will discuss optimization m
 ethods like (another) Kruskal’s algorithm for the cases\nwhen perfect ar
 rangement is not possible. Finally\, we will see through some examples how
 \nsociologists\, linguists\, mathematicians or even football coaches can u
 se MDS.
LOCATION:Online\, via MS Teams
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