Preprocessing

Prepare raw microarray data for analysis using background adjustment, normalization, and expression filtering; extensive preprocessing of Affymetrix^®and Illumina^®data. Retrieve probe annotations from library files

Functions

`亲戚`	Perform Robust Multi-array Average (RMA) procedure onAffymetrixmicroarray probe-level data
`affygcrma`	Perform GC Robust Multi-array Average (GCRMA) procedure onAffymetrixmicroarray probe-level data
`affyinvarsetnorm`	Perform rank invariant set normalization on probe intensities from multipleAffymetrixCEL or DAT files
`affyprobeaffinities`	计算Affymetrixprobe affinities from their sequences and MM probe intensities
`affysnpintensitysplit`	SplitAffymetrixSNP probe intensity information for alleles A and B
`affysnpquartets`	创建SNP探测四重奏表的表Affymetrixprobe set

`探针值`	Create table ofAffymetrixprobe set intensity values
`probesetlookup`	Look up information forAffymetrixprobe set
`probesetplot`	PlotAffymetrixprobe set intensity values
`probesetlink`	Display probe set information onNetAffxWeb site
`probelibraryinfo`	Create table of probe set library information

`rmabackadj`	Perform background adjustment onAffymetrixmicroarray probe-level data using Robust Multi-array Average (RMA) procedure
`rmasummary`	Calculate gene expression values fromAffymetrixmicroarray probe-level data using Robust Multi-array Average (RMA) procedure
`gcrma`	Perform GC Robust Multi-array Average (GCRMA) background adjustment, quantile normalization, and median-polish summarization onAffymetrixmicroarray probe-level data
`gcrmabackadj`	Perform GC Robust Multi-array Average (GCRMA) background adjustment onAffymetrixmicroarray probe-level data using sequence information
`zonebackadj`	Perform background adjustment onAffymetrixmicroarray probe-level data using zone-based method

`manorm`	Normalize microarray data
`quantilenorm`	Quantile normalization over multiple arrays
`mainvarsetnorm`	Perform rank invariant set normalization on gene expression values from two experimental conditions or phenotypes
`malowess`	Smooth microarray data using Lowess method
`exprprofrange`	Calculate range of gene expression profiles
`Exprprofvar`	Calculate variance of gene expression profiles

`geneentropyfilter`	Remove genes with low entropy expression values
`genelowvalfilter`	Remove gene profiles with low absolute values
`generangefilter`	Remove gene profiles with small profile ranges
`genevarfilter`	Filter genes with small profile variance

`maimage`	Spatial image for microarray data
`microplateplot`	Display visualization of microtiter plate

`ilmnbslookup`	Look upIlluminaBeadStudiotarget (probe) sequence and annotation information
`magetfield`	Extract data from microarray structure

Featured Examples

Preprocessing Affymetrix® Microarray Data at the Probe Level

Use MATLAB® and Bioinformatics Toolbox™ for preprocessing Affymetrix® oligonucleotide microarray probe-level data with two preprocessing techniques, Robust Multi-array Average (RMA) and GC Robust Multi-array Average (GCRMA).

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Bioinformatics Toolbox Documentation

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