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Set operations on ROIs

Source: R/geometry.R
at_roi_setops.Rd

Combine ROIs geometrically. Each accepts several annot_roi via ..., or a single annot_layer. Multi-part results are returned as one ROI with MULTIPOLYGON geometry (the return type is always a single annot_roi).

Usage

at_roi_union(..., call = rlang::caller_env())

at_roi_intersect(..., call = rlang::caller_env())

at_roi_difference(..., call = rlang::caller_env())

at_roi_symdiff(..., call = rlang::caller_env())

Arguments

...

Two or more annot_roi, or a single annot_layer.

call

The calling environment, for error reporting.

Value

A single annot_roi with source = "derived".

See also

Other geometry: at_check_containment(), at_check_geometry(), at_clamp(), at_fix_geometry(), at_flip_y(), at_roi_buffer(), at_roi_contains(), at_roi_distance(), at_roi_overlaps(), at_roi_rescale(), at_roi_ring(), at_roi_simplify(), at_rois_overlap(), at_snap(), at_transform()

Examples

a <- at_roi_rect(0, 0, 6, 6, label = "x")
b <- at_roi_rect(4, 4, 10, 10, label = "x")
at_roi_area(at_roi_intersect(a, b))
#> [1] 4