Locate (and identify) clicks

Click into a plot to get the location or identify values

gt_locate(
  samples = 1,
  panel = NULL,
  identify = FALSE,
  snap = FALSE,
  raw = FALSE,
  show = TRUE,
  ...
)

Arguments

samples	[integerish(1)] the number of clicks.
panel	[character(1)] the panel in which to locate (i.e. the title shown over the plot).
identify	[logical(1)] get the raster value or geom ID at the sampled location (TRUE) or merely the location (FALSE, default).
snap	[logical(1)] should the returned value(s) be set to the nearest raster cell's center (TRUE) or should they remain the selected, "real" value (FALSE, default)?
raw	[logical(1)] should the complete statistics about the clicks be returned (TRUE), or should only the basic output be returned (FALSE, default)?
show	[logical(1)] should information be plotted (TRUE), or should they merely be returned to the console (FALSE, default)?
...	[various] graphical parameters of the objects that are created when show = TRUE.

Value

A tibble of the selected locations and, if identify = TRUE, the respective values. If show = TRUE the values are also shown in the plot.

See also

Other geometry tools: gt_filter(), gt_pull(), gt_reflect(), gt_rotate(), gt_scale(), gt_skew(), gt_stretch(), gt_translate()

Examples

if(dev.interactive()){

  # locate coordinates with geoms
  visualise(geom = gtGeoms$polygon)
  gt_locate(samples = 2)

  # locate or identify values with rasters
  visualise(raster = gtGeoms$grid$continuous)
  gt_locate(identify = TRUE, snap = TRUE)

  # with several panels, specify a target
  visualise(gtGeoms$grid$categorical, gtGeoms$grid$continuous)
  gt_locate(samples = 4, panel = "categorical",
            snap = TRUE, identify = TRUE)

}