Create a point geom
Create a point geometry (of class geom) either by specifying
anchor values or by sketching it.
gs_point(anchor = NULL, window = NULL, vertices = 1, ...)
anchor |
[ |
window |
[ |
vertices |
[ |
... |
[various] |
The argument anchor indicates how the geom is created:
if anchor is set, the geom is created parametrically
from the points given in anchor,
if it is not set either
window or a default window between 0 and 1 is opened to sketch the
geom.
A geom.
Other geometry shapes:
gs_line(),
gs_polygon(),
gs_random()
# 1. create points programmatically
coords <- data.frame(x = c(40, 70, 70, 50),
y = c(40, 40, 60, 70))
# if no window is set, the bounding box will be set as window
(aGeom <- gs_point(anchor = coords))
# the vertices are plottet relative to the window
window <- data.frame(x = c(0, 80),
y = c(0, 80))
points <- gs_point(anchor = coords, window = window)
visualise(points, linecol = "green")
# when a geom is used in 'anchor', its properties are passed on
aGeom <- setWindow(x = aGeom, to = window)
points <- gs_point(anchor = aGeom)
visualise(points)
# 2. sketch two points
if(dev.interactive()){
points <- gs_point(vertices = 2)
visualise(points, linecol = "green", pointsymbol = 5, new = FALSE)
}Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.