| Title: | Image Data Used in the Loon Package Demos |
|---|---|
| Description: | Image data used as examples in the loon R package. |
| Authors: | Adrian Waddell [aut, cre], R. Wayne Oldford [aut] |
| Maintainer: | Adrian Waddell <[email protected]> |
| License: | GPL-2 |
| Version: | 0.0.4 |
| Built: | 2024-11-14 05:13:49 UTC |
| Source: | https://github.com/cran/RnavGraphImageData |
Binary 20x16 digits of "0" through "9" and capital "A" through "Z". 39 examples of each class.
From Simon Lucas' ([email protected]), Algoval system.
binaryalphadigitsbinaryalphadigits
Data frame with one image per row.
http://www.cs.nyu.edu/~roweis/data.html
8-bit 16x16 grayscale images of "0" through "9"; 1100 examples of each class.
digitsdigits
Data frame with one image per column.
http://www.cs.nyu.edu/~roweis/data.html
Grayscale faces 8 bit [0-255], a few images of several different people.
400 total images, 64x64 size.
From the Oivetti database at ATT.
facesfaces
Data frame with one image per column.
http://www.cs.nyu.edu/~roweis/data.html
From Brendan Frey. Almost 2000 images of Brendan's face, taken from sequential frames of a small video. Size: 20x28.
freyfrey
Data frame with one image per column.
http://www.cs.nyu.edu/~roweis/data.html
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 )
L2Distance(a, b, df = 0)L2Distance(a, b, df = 0)
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. |
For A - (DxM) matrix B - (DxN) matrix
L2Distance returns a matrix of size (MxN).
This function was transcribed by the package maintainers from a Matlab to an R function.
Roland Bunschoten
A = matrix(runif(400*100),ncol=100) B = matrix(runif(400*200),ncol=200) d = L2Distance(A,B)A = matrix(runif(400*100),ncol=100) B = matrix(runif(400*200),ncol=200) d = L2Distance(A,B)
Dissimilarity object of class 'isomap'. Returned from:
isomap(vegdist(binaryalphadigits), k=6).
ordalphadigitsordalphadigits
Object of class 'isomap'.
Dissimilarity object of class 'isomap'. Returned from:
isomap(vegdist(t(frey), method="euclidean"),k = 12, ndim=6, fragmentedOK = TRUE)
ordfreyordfrey
Object of class 'isomap'.