## ----style, echo = FALSE, results = 'asis'-------------------------------------------------------- options(width=100) knitr::opts_chunk$set( eval=as.logical(Sys.getenv("KNITR_EVAL", "TRUE")), cache=as.logical(Sys.getenv("KNITR_CACHE", "TRUE"))) ## ----setup, echo=FALSE---------------------------------------------------------------------------- suppressPackageStartupMessages({ library(Biostrings) library(GenomicRanges) }) ## ----require-------------------------------------------------------------------------------------- library(GenomicRanges) ## ----help, eval=FALSE----------------------------------------------------------------------------- # help(package="GenomicRanges") # vignette(package="GenomicRanges") # vignette(package="GenomicRanges", "GenomicRangesHOWTOs") # ?GRanges ## ------------------------------------------------------------------------------------------------- library(Biostrings) data(phiX174Phage) phiX174Phage letterFrequency(phiX174Phage, c("A", "C", "G", "T")) letterFrequency(phiX174Phage, "GC", as.prob=TRUE)