toPWM {PWMEnrich} | R Documentation

## Convert motifs into PWMs

### Description

Convert motifs into PWMs

### Usage

    toPWM(
      motifs,
      ids = names(motifs),
      targets = names(motifs),
      seq.count = 50,
      prior = c(A = 0.25, C = 0.25, G = 0.25, T = 0.25),
      ...
    )

### Arguments

`motifs` | a list of motifs either as position probability matrices (PPM) or frequency matirces (PFMs)
`ids` | the set of IDs for the motifs (defaults to names of the 'motifs' list)
`targets` | the set of target TF names for the motifs (defaults to names of the 'motifs' list)
`seq.count` | provides a vector of sequence counts for probability matrices (PPMs). Default it 50.
`prior` | frequencies of the four letters in the genome. Default is uniform background.
`...` | other parameters to PWMUnscaled

### Examples

    ## Not run:
    if (requireNamespace("PWMEnrich.Dmelanogaster.background")) {
       data(MotifDb.Dmel.PFM, package = "PWMEnrich.Dmelanogaster.background")

       toPWM(MotifDb.Dmel.PFM) # convert to PWM with uniform background

       # get background for drosophila (quick mode on a reduced dataset)
       prior = getBackgroundFrequencies("dm3", quick=TRUE)
       toPWM(MotifDb.Dmel.PFM, prior=prior) # convert with genomic background
    }

    ## End(Not run)

[Package PWMEnrich version 4.28.1 Index]