Math Is Fun Forum

tina123

Member

Registered: 2012-04-29

Posts: 83

L2 distance

what is L2 distance ?
Can any one please explain a bit .
thanks

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: L2 distance

HI tina123;

Do you mean an L2 norm?

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

tina123

Member

Registered: 2012-04-29

Posts: 83

Re: L2 distance

HI tina123;

Do you mean an L2 norm?

yes Bbbym

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: L2 distance

Hi;

This is just a euclidean distance between points. It uses the pythagorean theorem. For a plane it looks like this:

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

tina123

Member

Registered: 2012-04-29

Posts: 83

Re: L2 distance

Hi;

This is just a euclidean distance between points. It uses the pythagorean theorem. For a plane it looks like this:

ok but Is that L2 norm ?
I heard new term for that simple distance method .

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: L2 distance

Hi;

The L2 norm as I understand it.

It is also sometimes described as the length of a vector or a distance between the origin and a point. That is what the other post has.

Also it is used in error analysis for curve fitting. We can describe a fit in terms of L1, L2 or L∞ norms.

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.