pdist2

Syntax

d = pdist2(m1, m2)

d = pdist2(m1, m2, metric)

Inputs

m1

The first matrix on which to operate.

Type: double

Dimension: matrix

m2

The second matrix on which to operate, having the same number of columns as m1.

Type: double

Dimension: matrix

metric

The distance function to compute.

The available options are as follows:

'euclidian' (default)

Euclidean distance.

'sqeuclidian'

Square of the Euclidean distance.

'chisq'

Chi-squared distance.

'cosine'

One minus the included angle between two vectors.

'emd'

Earth Mover's Distance.

'L1'

The L1 distance, or the sum of absolute coordinate differences.

Type: string

Outputs

d

The distance values. If m1 and m2 have p and q rows, respectively, then d has dimensions pxq.

Dimension: matrix

Example

m1 = [1,2,3;4,6,8;5,10,15;16,26,36];
m2 = [2,4,6;3,6,9;4,8,12];
p = pdist2(m1, m2)

p = [Matrix] 4 x 3
 3.74166   7.48331  11.22497
 3.46410   1.41421   4.47214
11.22497   7.48331   3.74166
39.74921  36.02777  32.31099

Comments

Element d(i,j) is computed from m1(i,:) and m2(:,j).