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ElMaestro
Hero

Denmark,
2017-10-27 14:58

Posting: # 17933
Views: 2,755
 

 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 FDA Ciclosporine draft guidance: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:

if (3) 4

x=c("Foo", "Bar")
b=data.frame(x)
typeof(b[,1]) ##aha, integer?
b[,1]+1 ##then let me add 1



Best regards,
ElMaestro

"(...) targeted cancer therapies will benefit fewer than 2 percent of the cancer patients they’re aimed at. That reality is often lost on consumers, who are being fed a steady diet of winning anecdotes about miracle cures." New York Times (ed.), June 9, 2018.
Helmut
Hero
avatar
Homepage
Vienna, Austria,
2017-10-27 15:17

@ ElMaestro
Posting: # 17934
Views: 2,459
 

 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?

Cheers,
Helmut Schütz
[image]

The quality of responses received is directly proportional to the quality of the question asked. ☼
Science Quotes
ElMaestro
Hero

Denmark,
2017-10-27 15:24

@ Helmut
Posting: # 17935
Views: 2,414
 

 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!"

if (3) 4

x=c("Foo", "Bar")
b=data.frame(x)
typeof(b[,1]) ##aha, integer?
b[,1]+1 ##then let me add 1



Best regards,
ElMaestro

"(...) targeted cancer therapies will benefit fewer than 2 percent of the cancer patients they’re aimed at. That reality is often lost on consumers, who are being fed a steady diet of winning anecdotes about miracle cures." New York Times (ed.), June 9, 2018.
Helmut
Hero
avatar
Homepage
Vienna, Austria,
2017-10-27 15:32

@ ElMaestro
Posting: # 17936
Views: 2,408
 

 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.

Cheers,
Helmut Schütz
[image]

The quality of responses received is directly proportional to the quality of the question asked. ☼
Science Quotes
nobody
Senior

2017-10-28 17:31

@ Helmut
Posting: # 17937
Views: 2,347
 

 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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