dist_L1

PURPOSE ^

Calculates the L1 Distance between vectors (ie the City-Block distance).

SYNOPSIS ^

function D = dist_L1( X, Y )

DESCRIPTION ^

 Calculates the L1 Distance between vectors (ie the City-Block distance).

 Assume X is an m-by-p matrix representing m points in p-dimensional space and Y is an
 n-by-p matrix representing another set of points in the same space. This function
 compute the m-by-n distance matrix D where D(i,j) is the L1 distance between X(i,:) and
 Y(j,:).  

 The L1 distance between two vectors is defined as:
   d(x,y) = sum( abs(xi-yi) );

 INPUTS
   X   - m-by-p matrix of m p-bin histograms
   Y   - n-by-p matrix of n p-bin histograms

 OUTPUTS
   D   - m-by-n distance matrix

 EXAMPLE
   X=[randn(100,5)]; Y=randn(40,5)+2;
   D = dist_L1( [X; Y], [X; Y] ); im(D)

 DATESTAMP
   29-Sep-2005  2:00pm

 See also DIST_EUCLIDEAN

CROSS-REFERENCE INFORMATION ^

This function calls: This function is called by:
Generated on Sun 02-Oct-2005 19:35:28 by m2html © 2003