Add genomic position transformation lines between tracks

circos.genomicPosTransformLines(
    data,
    track.height = 0.1,
    posTransform = NULL,
    horizontalLine = c("none", "top", "bottom", "both"),
    track.margin = c(0, 0),
    direction = c("inside", "outside"),
    col = "black",
    lwd = par("lwd"),
    lty = par("lty"),
    ...)

Arguments

data	A data frame containing genomic data.
track.height	Height of the track.
posTransform	Genomic position transformation function, see `posTransform.default` for an example.
horizontalLine	Whether to draw horizontal lines which indicate region width .
track.margin	Margin of tracks.
direction	Type of the transformation. `inside` means position transformed track are located inside and `outside` means position transformed track are located outside.
col	Color of lines, can be length of one or nrow of `data`.
lwd	Width of lines.
lty	Style of lines.
...	Pass to `circos.trackPlotRegion`.

Details

There is one representative situation when such position transformation needs to be applied. For example, there are two sets of regions in a chromosome in which regions in one set regions are quite densely to each other and regions in other set are far from others. Heatmap or text is going to be drawn on the next track. If there is no position transformation, heatmap or text for those dense regions would be overlapped and hard to identify, also ugly to visualize. Thus, a way to transform original positions to new positions would help for the visualization.

Examples

# There is no example
NULL
#> NULL