createWiggle {HELP} | R Documentation

## Create wiggle track

### Description

Create and write a wiggle track (UCSC Genome Browser format) to flat file

### Usage

    createWiggle(x, y, ...)

### Arguments

`x` | matrix of numerical data, where each column represents data for an individual wiggle track. `x` can also be of class `"ExpressionSet"`.
`y` | an additional matrix of numerical data with columns corresponding to chr, start, and end, respectively.
`...` | Arguments to be passed to methods (see `createWiggle-methods`): element which element of `AssayData` to use for a given `ExpressionSet` input (default is "exprs") feature.chr which element of `featureData` to use as chromosomal information (default is "CHR"). Can be a character matching `varLabel` or simply an integer indicating which feature to choose. feature.start which element of `featureData` to use as start positions (default is "START"). Can be a character matching `varLabel` or simply an integer indicating which feature to choose. feature.stop which element of `featureData` to use as end positions (default is "STOP"). Can be a character matching `varLabel` or simply an integer indicating which feature to choose. samples which sample(s) to use as data. Can be a vector of characters matching sample names, integers indicating which samples to choose, or a mixture of the two. If NULL (default), all samples will be used. colors vector of colors, indicates which colors to use for which wiggle track file location of file to write wiggle track information; if "", wiggle track prints to the standard output connection: see `cat`. append logical; if TRUE, the output is appended to an existent wiggle track file. If FALSE (default), a new file with a new header is created and any existing file of the same name is destroyed. na.rm logical; if TRUE (default), missing values are removed from data. If FALSE any missing values cause an error sep a string used to separate columns. Using sep = "t" (default) gives tab-delimited output. ... other arguments to be passed to `cat`. See `cat`.

### Author(s)

Reid F. Thompson (rthompso@aecom.yu.edu)

### References

UCSC Genome Browser, http://genome.ucsc.edu/goldenPath/help/customTrack.html: Kent, W.J., Sugnet, C. W., Furey, T. S., Roskin, K.M., Pringle, T. H., Zahler, A. M., and Haussler, D. The Human Genome Browser at UCSC. Genome Res. 12(6), 996-1006 (2002).

### See Also

`write`, `cat`

### Examples

    #demo(pipeline,package="HELP")

    chr <- rep("chr1", 500)
    start <- (1:500)*200
    end <- start+199
    data <- sample(5*(1:10000/10000)-2, size=500)
    data <- cbind(data, abs(data), -1*data)
    colnames(data) <- c("data", "abs", "opposite")
    createWiggle(data, cbind(chr, start, end))

    #rm(chr, start, end, data)

[Package HELP version 1.2.0 Index]