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plugins/base2/net.sf.basedb.normalizers/tags/1.0/README
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$Id: README 933 20081218 11:41:56Z jari $
About Normalization package for BASE
The Normalization package for BASE (net.sf.basedb.normalization)
plugin set is a compilation of normalisers for expression data. See
Documentation
below for further information about the different
plugins in this package. Common to the plugins provided with this
package is that they work on bioassay set with either 1channel or
2channel. The algorithms are working on expression values, that is
for 2channel data, ratios ch1/ch2 are used.
Normalization package for BASE
is free software. See the file
license.txt for copying conditions.
The package was created by Martin Svensson and Jari Hakkinen.
Downloading
Normalization package for BASE
can be obtained from
Installation
Installation instructions can be found in the 'INSTALL' file.
Documentation
Average normalization
This plugin scales the expression values for an assay with a factor, S, equal to the ratio of either i) the geometric mean of the expression values of all spots in the bioassay set divided by the assay average, or ii) a user defined value divided by the assay average.
The new expression values will become S times the original expression value.
Background subtraction and proper filtration have to be done before running this plugin.
Quantile normalization
In quantile normalization each assay data is sorted in ascending expression value order and added to a matrix as columns. The matrix rows will contain mixed probes (also known as reporters or genes) decided by their rank. For each row in the matrix, the expression values are replaced with the row average value. Finally, each assay is reordered into its original order to retain a standard expression matrix were each row represents one probe. Assays are not mixed.
Background subtraction and proper filtration have to be done on the bioassay set before running this plugin. The bioassay set must not contain any missing values.
Copyright (C) 2008 Jari Häkkinen, Martin Svensson This file is part of the Normalizers plugin package for BASE (net.sf.based.normalizers). The package is available at http://baseplugins.thep.lu.se/ BASE main site is http://base.thep.lu.se/ This is free software; 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 (at your option) any later version. The software 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. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.