Type: Package
Title: Image Data Used in the Loon Package Demos
Version: 0.0.4
Description: Image data used as examples in the loon R package.
URL: http://waddella.github.io/loon/
Depends: R (≥ 2.10.0)
License: GPL-2
NeedsCompilation: no
Packaged: 2018-05-15 18:33:50 UTC; adrian
Author: Adrian Waddell [aut, cre], R. Wayne Oldford [aut]
Maintainer: Adrian Waddell <adrian@waddell.ch>
Repository: CRAN
Date/Publication: 2018-05-15 21:09:03 UTC

Euclidean distances between vector in A and B

Description

This fully vectorized (VERY FAST!) m-file computes the Euclidean distance between two vectors by:

||A-B|| = sqrt ( ||A||^2 + ||B||^2 - 2*A.B )

Usage

L2Distance(a, b, df = 0)

Arguments

a

Either a matrix or a vector.

b

Either a matrix or a vector.

df

df = 1, force diagonals to be zero; 0 (default), do not force.

Value

For A - (DxM) matrix B - (DxN) matrix

L2Distance returns a matrix of size (MxN).

Note

This function was transcribed by the package maintainers from a Matlab to an R function.

Author(s)

Roland Bunschoten

Examples

A = matrix(runif(400*100),ncol=100)
B = matrix(runif(400*200),ncol=200)

d = L2Distance(A,B)

Binary Alphadigits

Description

Binary 20x16 digits of "0" through "9" and capital "A" through "Z". 39 examples of each class.

From Simon Lucas' (sml@essex.ac.uk), Algoval system.

Usage

binaryalphadigits

Format

Data frame with one image per row.

Source

http://www.cs.nyu.edu/~roweis/data.html

USPS Handwritten Digits

Description

8-bit 16x16 grayscale images of "0" through "9"; 1100 examples of each class.

Usage

digits

Format

Data frame with one image per column.

Source

http://www.cs.nyu.edu/~roweis/data.html

Olivetti Faces

Description

Grayscale faces 8 bit [0-255], a few images of several different people.

400 total images, 64x64 size.

From the Oivetti database at ATT.

Usage

faces

Format

Data frame with one image per column.

Source

http://www.cs.nyu.edu/~roweis/data.html

Frey Face

Description

From Brendan Frey. Almost 2000 images of Brendan's face, taken from sequential frames of a small video. Size: 20x28.

Usage

frey

Format

Data frame with one image per column.

Source

http://www.cs.nyu.edu/~roweis/data.html

Dissimilarity object of class 'isomap' for Binary Alphadigits data

Description

Dissimilarity object of class 'isomap'. Returned from:

isomap(vegdist(binaryalphadigits), k=6).

Usage

ordalphadigits

Format

Object of class 'isomap'.

Dissimilarity object of class 'isomap' for Frey Faces data

Description

Dissimilarity object of class 'isomap'. Returned from:

isomap(vegdist(t(frey), method="euclidean"),k = 12, ndim=6, fragmentedOK = TRUE)

Usage

ordfrey

Format

Object of class 'isomap'.