Modifies 'Dense' track contents.
gtrack.modify(track = NULL, expr = NULL, intervals = NULL)None.
This function modifies the contents of a 'Dense' track by the values of 'expr'. 'intervals' argument controls which portion of the track is modified. The iterator policy is set internally to the bin size of the track.
gdb.init_examples()
intervs <- gintervals(1, 300, 800)
gextract("dense_track", intervs)
#> chrom start end dense_track intervalID
#> 1 chr1 300 350 0.16 1
#> 2 chr1 350 400 0.16 1
#> 3 chr1 400 450 0.16 1
#> 4 chr1 450 500 0.06 1
#> 5 chr1 500 550 0.06 1
#> 6 chr1 550 600 0.02 1
#> 7 chr1 600 650 0.04 1
#> 8 chr1 650 700 0.00 1
#> 9 chr1 700 750 0.00 1
#> 10 chr1 750 800 0.00 1
gtrack.modify("dense_track", "dense_track * 2", intervs)
gextract("dense_track", intervs)
#> chrom start end dense_track intervalID
#> 1 chr1 300 350 0.32 1
#> 2 chr1 350 400 0.32 1
#> 3 chr1 400 450 0.32 1
#> 4 chr1 450 500 0.12 1
#> 5 chr1 500 550 0.12 1
#> 6 chr1 550 600 0.04 1
#> 7 chr1 600 650 0.08 1
#> 8 chr1 650 700 0.00 1
#> 9 chr1 700 750 0.00 1
#> 10 chr1 750 800 0.00 1
gtrack.modify("dense_track", "dense_track / 2", intervs)