Description Installation To get started Further readings How to cite this package Wishlist License Author(s) References
Methods for microarray analysis that take basic data types such as matrices and lists of vectors. These methods can be used standalone, be utilized in other packages, or be wrapped up in higher-level classes.
To install this package, see http://bioconductor.org/packages/release/bioc/html/aroma.light.html.
For scanner calibration:
see calibrateMultiscan
() - scan the same array two or more times to calibrate for scanner effects and extended dynamical range.
To normalize multiple single-channel arrays all with the same number of probes/spots:
normalizeAffine
() - normalizes, on the intensity scale, for differences in offset and scale between channels.
normalizeQuantileRank
(), normalizeQuantileSpline
() - normalizes, on the intensity scale, for differences in empirical distribution between channels.
To normalize multiple single-channel arrays with varying number probes/spots:
normalizeQuantileRank
(), normalizeQuantileSpline
() - normalizes, on the intensity scale, for differences in empirical distribution between channels.
To normalize two-channel arrays:
normalizeAffine
() - normalizes, on the intensity scale, for differences in offset and scale between channels. This will also correct for intensity-dependent affects on the log scale.
normalizeCurveFit
() - Classical intensity-dependent normalization, on the log scale, e.g. lowess normalization.
To normalize three or more channels:
normalizeAffine
() - normalizes, on the intensity scale, for differences in offset and scale between channels. This will minimize the curvature on the log scale between any two channels.
Several of the normalization methods proposed in [1]-[7] are available in this package.
Whenever using this package, please cite one or more of [1]-[7].
Here is a list of features that would be useful, but which I have too little time to add myself. Contributions are appreciated.
At the moment, nothing.
If you consider to contribute, make sure it is not already implemented by downloading the latest "devel" version!
The releases of this package is licensed under GPL version 2 or newer.
NB: Except for the robustSmoothSpline()
method,
it is alright to distribute the rest of the package under
LGPL version 2.1 or newer.
The development code of the packages is under a private licence (where applicable) and patches sent to the author fall under the latter license, but will be, if incorporated, released under the "release" license above.
Henrik Bengtsson, Pierre Neuvial
Some of the reference below can be found at
http://www.aroma-project.org/publications/.
[1] H. Bengtsson, Identification and normalization of plate effects
in cDNA microarray data, Preprints in Mathematical Sciences,
2002:28, Mathematical Statistics, Centre for Mathematical Sciences,
Lund University, 2002.
[2] H. Bengtsson, The R.oo package - Object-Oriented Programming with References Using Standard R Code, In Kurt Hornik, Friedrich Leisch and Achim Zeileis, editors, Proceedings of the 3rd International Workshop on Distributed Statistical Computing (DSC 2003), March 20-22, Vienna, Austria. http://www.ci.tuwien.ac.at/Conferences/DSC-2003/Proceedings/
[3] H. Bengtsson, aroma - An R Object-oriented Microarray
Analysis environment, Preprints in Mathematical Sciences (manuscript
in preparation), Mathematical Statistics, Centre for Mathematical
Sciences, Lund University, 2004.
[4] H. Bengtsson, J. Vallon-Christersson and G. JÃ¶nsson, Calibration and assessment of channel-specific biases in microarray data with extended dynamical range, BMC Bioinformatics, 5:177, 2004.
[5] Henrik Bengtsson and Ola HÃ¶ssjer, Methodological Study of Affine Transformations of Gene Expression Data, Methodological study of affine transformations of gene expression data with proposed robust non-parametric multi-dimensional normalization method, BMC Bioinformatics, 2006, 7:100.
[6] H. Bengtsson, R. Irizarry, B. Carvalho, and T. Speed, Estimation and assessment of raw copy numbers at the single locus level, Bioinformatics, 2008.
[7] H. Bengtsson, A. Ray, P. Spellman and T.P. Speed, A single-sample method for normalizing and combining full-resolutioncopy numbers from multiple platforms, labs and analysis methods, Bioinformatics, 2009.
[8] H. Bengtsson, P. Neuvial and T.P. Speed, TumorBoost: Normalization of allele-specific tumor copy numbers from a single pair of tumor-normal genotyping microarrays, BMC Bioinformatics, 2010, 11:245. [PMID 20462408]
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