title: Implementation of a gene expression index calculation method based on the PDNN model.
abstract: Gene expression index calculations from Affymetrix GeneChips have been dominated by the Affymetrix MAS, dChip, and RMA methods. A new method to estimate the gene expression value utilizing the probe sequence information named position-dependent nearest-neighbor (PDNN) has been suggested by Zhang et al. (2003). Here we describe an open source implementation of the PDNN method for the statistical language R.
  
  
  BACKGROUND
  The package can be downloaded from http://www.bioconductor.org/repository/devel/package/html/affypdnn.html
  
  
  BACKGROUND
  hbjorn@cbs.dtu.dk.
authors.affiliation: Center for Biological Sequence Analysis, BioCentrum-DTU Technical University of Denmark Building 208, DK-2800 Lyngby, Denmark. hbjorn@cbs.dtu.dk
authors.forename: Henrik Bjørn
authors.initials: HB
authors.lastname: Nielsen
authors.forename: Laurent
authors.initials: L
authors.lastname: Gautier
authors.forename: Steen
authors.initials: S
authors.lastname: Knudsen
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D020869:Gene Expression Profiling / Q000379:methods*; D008957:Models, Genetic; D015233:Models, Statistical; D020411:Oligonucleotide Array Sequence Analysis / Q000379:methods*; D017422:Sequence Analysis, DNA / Q000379:methods*; D012984:Software