Welcome to pydiodon’s documentation!

A python library for linear dimension reduction.

Identity card

authors:

• Alain Franc

• Jean-Marc Frigerio

mail:

• alain.franc@inrae.fr

contributors:

• Olivier Coulaud

• Romain Peressoni

• Florent Pruvost

maintainer:

Alain Franc

started:

21/02/17

version:

23.06.12

release:

0.0.4

licence:

GPL-3.0 or later

This file is part of diodon project. You can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

Information: the development of this library still is ongoing. When a function has not been tested or its development still in infancy, this is indicated in its documentation, and it is advised not to use it.

Functions

coa	Correspondance Analysis of an array
mds	Multidimensional Scaling of a distance or dissimilarity array
pca	Principal Component Analysis
mat_evd	Computes the eigenvalues and eigenvectors of a matrix
svd_grp	SVD of a (large) matrix by Gaussian Random Projection
bicentering	Bicentering a matrix
centering_operator	Centering operator for a matrix
center_col	centers a matrix columnwise
center_row	centers a matrix row-wise
scale	Scales a matrix columnwise
get_correlation_matrix	Gets the correlation matrix
dis2gram	Computes a Gram matrix knowing a distance matrix
pca_core	core method for PCA (Principal Component Analysis) of an array
pca_met	PCA of an array with metrics on rows and/or columns - without guaranty
pca_iv	PCA of an array with instrumental variables
project_on	Builds the projection operator on space spanned by the columns of an array
loadfile	A generic function for loading datasets as numpy arrays
load_ascii	Loads an ascii file as a numpy array
load_hdf5	loads a hdf5 file as a numpy array
load_dataset	Loads datasets provided as examples after having cloned companion git of (py)diodon.
writefile	A generic function for saving a numpy array as a file
write_ascii	Write an ascii file
write_hdf5	Write a hdf5 file
plot_eig	Plots the singular or eigenvalues
plot_components_scatter	Scatter plot of the result of a Principal Component Analysis
plot_components_splines	Plots principal components as lines smoothed with cublic splines, one per item
plot_cumulated_quality_per_item	plots the quality per item
plot_components_quality	Scatter plot of the principal components with each dot colored according to the cumulated quality of the item for a given axis
plot_var	Plots the correlations between the variables
plot_var_heatmap	Plots a heatmap of the coordinates of the principal axis
plot_correlation_matrix	Plots a heatmap of the correlation matrix
plot_coa	Scatter plot of the result of a Correspondence Analysis
hovering	Display a label of one dot selected with the mouse in a scatter plot
plot_components_heatmap	Builds the density heatmap of the point cloud of the components of a PCA

Indices and tables

• Index

• Module Index

• Search Page