| 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
binaryalphadigitsFormat
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
digitsFormat
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
facesFormat
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
freyFormat
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
ordalphadigitsFormat
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
ordfreyFormat
Object of class 'isomap'.