mva.pairs {affy} | R Documentation

## M vs. A Matrix

### Description

A matrix of M vs. A plots is produced. Plots are made on the upper triangle and the IQR of the Ms are displayed in the lower triangle

### Usage

    mva.pairs(x, labels=colnames(x), log.it=TRUE,span=2/3,family.loess="gaussian",
              digits=3,line.col=2,main="MVA plot",...)

### Arguments

`x` | A matrix containing the chip data in the columns.
`labels` | the names of the variables.
`log.it` | logical. If `TRUE` uses log scale.
`span` | span to be used for loess fit.
`family.loess` | `"guassian"` or `"symmetric"` as in `loess`.
`digits` | number of digits to use in the display of IQR.
`line.col` | color of the loess line.
`main` | an overall title for the plot.
`...` | graphical parameters can be given as arguments to `mva.plot`

### See Also

`pairs`

### Examples

        x <- matrix(rnorm(4000),1000,4)
        x[,1] <- x[,1]^2
        dimnames(x) <- list(NULL,c("chip 1","chip 2","chip 3","chip 4"))
        mva.pairs(x,log=FALSE,main="example")

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