ElMaestro
★★★

Denmark,
2017-10-27 16:58
(2344 d 15:37 ago)

Posting: # 17933
Views: 6,346
 

 Earth-mover's distance [Nonparametrics]

Hi all,

re. FDA Ciclosporine draft guidance:

Does anyone know where I should start to get to grips with Earth-mover's distance for real and in practice?
Wikipedia, the reference indicated in the guidance and some random googling hasn't given me a solid basis for understanding anything, much less for doing anything of value with it.

Note that the footnote opens up the possibility of using some other statistical similarity measures, and I hope to go that way, but let us for the purpose of this thread discuss EMD only :-D:confused::pirate:

Pass or fail!
ElMaestro
Helmut
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Vienna, Austria,
2017-10-27 17:17
(2344 d 15:17 ago)

@ ElMaestro
Posting: # 17934
Views: 5,238
 

 Earth-mover's distance

Hi ElMaestro,

❝ […] Earth-mover's distance …


OT: Wow, what a term! Reminds me on

Δῶς μοι πᾶ στῶ καὶ τὰν γᾶν κινάσω.
Give me the place to stand, and I shall move the earth.
    Archimedes of Syracuse


Bonus question: Who the heck is Stolfi?

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ElMaestro
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Denmark,
2017-10-27 17:24
(2344 d 15:11 ago)

@ Helmut
Posting: # 17935
Views: 5,131
 

 Earth-mover's distance

Hi Hötzi,

❝ Bonus question: Who the heck is Stolfi?


What????
I don't think I know anyone with that name or with that handle. Sounds like a German side dish.
"Einmal Currywurst mit Stolfi und dazu ein Fassbier, bitte!"

Pass or fail!
ElMaestro
Helmut
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Vienna, Austria,
2017-10-27 17:32
(2344 d 15:02 ago)

@ ElMaestro
Posting: # 17936
Views: 5,227
 

 Earth-mover's distance

Hi ElMaestro,

❝ ❝ Bonus question: Who the heck is Stolfi?

❝ I don't think I know anyone with that name or with that handle.


Acc. to the original publication the lad* who coined the term (personal communication 1994).

❝ Sounds like a German side dish.

❝ "Einmal Currywurst mit Stolfi und dazu ein Fassbier, bitte!"


Reminds me on the German release of Disney’s Lady and the Tramp (“Susi und Strolch”).


Edit: Jorge Stolfi.

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nobody
nothing

2017-10-28 19:31
(2343 d 13:04 ago)

@ Helmut
Posting: # 17937
Views: 5,154
 

 Earth-mover's distance

"Informally, if the distributions are interpreted as two different ways of piling up a certain amount of dirt over the region D, the EMD is the minimum cost of turning one pile into the other; where the cost is assumed to be amount of dirt moved times the distance by which it is moved."

https://en.wikipedia.org/wiki/Earth_mover%27s_distance

Seriously?

Mayby some quantum effects might come into play... I'm out (never in).

Kindest regards, nobody
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