Preprocessing

Prepare raw microarray data for analysis

Process microarray data using background adjustment, normalization, and expression filtering.

Functions

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manormNormalize microarray data
quantilenormPerform quantile normalization over multiple arrays
mainvarsetnormPerform rank invariant set normalization on gene expression values from two experimental conditions or phenotypes
malowessSmooth microarray data using Lowess method
exprprofrangeCalculate range of gene expression profiles
exprprofvarCalculate variance of gene expression profiles
geneentropyfilterRemove genes with low entropy expression values
genelowvalfilterRemove gene profiles with low absolute values
generangefilterRemove gene profiles with small profile ranges
genevarfilterFilter genes with small profile variance
maimageSpatial image for microarray data
microplateplotDisplay visualization of microtiter plate
ilmnbslookupLook up Illumina BeadStudio target (probe) sequence and annotation information
magetfieldExtract data from microarray structure