geom_alignment {ggbio} | R Documentation

## Alignment geoms for GRanges object

### Description

Show interval data as alignment.

### Usage

    ## S4 method for signature 'GRanges'
    geom_alignment(data, ..., xlab, ylab, main, facets = NULL, stat =
                     c("stepping", "identity"), range.geom = c("rect",
                     "arrowrect"), gap.geom = c("chevron", "arrow",
                     "segment"), rect.height = NULL, group.selfish = TRUE,
                      label = TRUE)

    ## S4 method for signature 'TxDbOREnsDb'
    geom_alignment(data, ..., which, columns = c("tx_id", "tx_name",
                     "gene_id"), names.expr = "tx_name", facets = NULL,
                     truncate.gaps = FALSE, truncate.fun = NULL, ratio =
                     0.0025)

    ## S4 method for signature 'GRangesList'
    geom_alignment(data, ..., which = NULL,
                              cds.rect.h = 0.25,
                              exon.rect.h = cds.rect.h,
                              utr.rect.h = cds.rect.h/2,
                              xlab, ylab, main,
                              facets = NULL, geom = "alignment",
                              stat = c("identity", "reduce"),
                              range.geom = "rect",
                              gap.geom = "arrow",
                              utr.geom = "rect",
                              names.expr = NULL,
                              label = TRUE,
                              label.color = "gray40",
                              arrow.rate = 0.015,
                              length = unit(0.1, "cm"))

    ## S4 method for signature 'OrganismDb'
    geom_alignment(data, ..., which,
                       columns = c("TXNAME", "SYMBOL", "TXID", "GENEID"),
                       names.expr = "SYMBOL",
                       facets = NULL,
                       truncate.gaps = FALSE,
                       truncate.fun = NULL, ratio = 0.0025
                       )

### Arguments

`data` | A `GRanges`, `data.frame`, `TxDb` or `EnsDb` object.
`...` | Extra parameters such as aes() passed.
`which` | `GRanges` object to subset the `TxDb` or `EnsDb` object. For `EnsDb`: can also be a single object extending `AnnotationFilter`, an `AnnotationFilterList` combining such objects or a filter expression in form of a `formula`.
`cds.rect.h` | cds heights.
`exon.rect.h` | exon heights.
`utr.rect.h` | utr heights.
`label.color` | label color.
`arrow.rate` | arrow rate.
`length` | arrow length.
`columns` | columns to get from object.
`xlab` | Label for x
`ylab` | Label for y
`main` | Title for plot.
`facets` | Faceting formula to use.
`stat` | For `GRanges`: Character vector specifying statistics to use. "stepping" with randomly assigned stepping levels as y varialbe. "identity" allow users to specify `y` value in `aes`. For `TxDb`: defualt "identity" give full gene model and "reduce" for reduced model.
`gap.geom` | Geom for 'gap' computed from the data you passed based on the group information.
`rect.height` | Half height of the arrow body.
`group.selfish` | Passed to `addStepping`, control whether to show each group as unique level or not. If set to `FALSE`, if two groups are not overlapped with each other, they will probably be layout in the same level to save space.
`truncate.gaps` | logical value indicate to truncate gaps or not.
`truncate.fun` | shrinkage function. Please see `shrinkagefun` in package biovizBase.
`ratio` | used in `maxGap`.
`geom` | geometric object. only support "gene" now.
`range.geom` | geom for main intevals or exons.
`utr.geom` | geom for utr region.
`names.expr` | expression for showing y label.
`label` | logical value. Whether to label the intervals with names specified by argument `names.expr`.

### Value

A 'Layer'.

### Author(s)

Tengfei Yin

### Examples

    set.seed(1)
    N <- 100
    require(GenomicRanges)
    ## ======================================================================
    ##  simmulated GRanges
    ## ======================================================================
    gr <- GRanges(seqnames =
                  sample(c("chr1", "chr2", "chr3"),
                         size = N, replace = TRUE),
                  IRanges(
                          start = sample(1:300, size = N, replace = TRUE),
                          width = sample(70:75, size = N,replace = TRUE)),
                  strand = sample(c("+", "-", "*"), size = N,
                    replace = TRUE),
                  value = rnorm(N, 10, 3), score = rnorm(N, 100, 30),
                  sample = sample(c("Normal", "Tumor"),
                    size = N, replace = TRUE),
                  pair = sample(letters, size = N,
                    replace = TRUE))

    ## ======================================================================
    ##  default
    ## ======================================================================
    ggplot(gr) + geom_alignment()
    ## or
    ggplot() + geom_alignment(gr)

    ## ======================================================================
    ##  facetting and aesthetics
    ## ======================================================================
    ggplot(gr) + geom_alignment(facets = sample ~ seqnames, aes(color = strand, fill = strand))

    ## ======================================================================
    ##  stat:stepping
    ## ======================================================================
    ggplot(gr) + geom_alignment(stat = "stepping", aes(group = pair))

    ## ======================================================================
    ##  group.selfish controls when
    ## ======================================================================
    ggplot(gr) + geom_alignment(stat = "stepping", aes(group = pair), group.selfish = FALSE)

    ## =======================================
    ##  main/gap geom
    ## =======================================
    ggplot(gr) + geom_alignment(range.geom = "arrowrect", gap.geom = "chevron")

    ## =======================================
    ##  For TxDb
    ## =======================================
    library(TxDb.Hsapiens.UCSC.hg19.knownGene)
    data(genesymbol, package = "biovizBase")
    txdb <- TxDb.Hsapiens.UCSC.hg19.knownGene
    ## made a track comparing full/reduce stat.
    ggbio() + geom_alignment(data = txdb, which = genesymbol["RBM17"])
    p1 <- ggplot(txdb) + geom_alignment(which = genesymbol["RBM17"])
    p1
    p2 <- ggplot(txdb) + geom_alignment(which = genesymbol["RBM17"], stat = "reduce")
    tracks(full = p1, reduce = p2, heights = c(3, 1))
    tracks(full = p1, reduce = p2, heights = c(3, 1)) + theme_tracks_sunset()
    tracks(full = p1, reduce = p2, heights = c(3, 1)) +
         theme_tracks_sunset(axis.line.color = NA)
    ## change y labels
    ggplot(txdb) + geom_alignment(which = genesymbol["RBM17"], names.expr = "tx_id:::gene_id")

[Package ggbio version 1.34.0 Index]