| extendTrailers {ORFik} | R Documentation |
Will extend the trailers or transcripts downstream (3' end) by extension.
Remember the extension is general not relative, that means splicing
will not be taken into account.
Requires the grl to be sorted beforehand,
use sortPerGroup to get sorted grl.
extendTrailers(grl, extension = 1000L)
grl |
usually a |
extension |
an integer, how much to extend downstream (3' end). Eiter single value that will apply for all, or same as length of grl which will give 1 update value per grl object. Or a GRangesList where start / stops sites by strand are the positions to use as new starts. |
an extended GRangeslist
Other ExtendGenomicRanges:
asTX(),
coveragePerTiling(),
extendLeaders(),
reduceKeepAttr(),
tile1(),
txSeqsFromFa(),
windowPerGroup()
library(GenomicFeatures)
samplefile <- system.file("extdata", "hg19_knownGene_sample.sqlite",
package = "GenomicFeatures")
txdb <- loadDb(samplefile)
threeUTRs <- threeUTRsByTranscript(txdb) # <- extract only 5' leaders
tx <- exonsBy(txdb, by = "tx", use.names = TRUE)
## now try(extend downstream 1000):
extendTrailers(threeUTRs, extension = 1000)
## Or on transcripts
extendTrailers(tx, extension = 1000)