Create a line geom
Create a line geometry (of class geom) either by specifying
anchor values or by sketching it.
gs_line(anchor = NULL, window = NULL, features = 1, vertices = 2, ...)
anchor |
[ |
window |
[ |
features |
[ |
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_point(),
gs_polygon(),
gs_random()
# 1. create a line 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_line(anchor = coords))
# the vertices are plottet relative to the window
window <- data.frame(x = c(0, 80),
y = c(0, 80))
aLine <- gs_line(anchor = coords, window = window)
visualise(aLine, linecol = "green")
# when a geom is used in 'anchor', its properties are passed on
aGeom <- setWindow(x = aGeom, to = window)
aLine <- gs_line(anchor = aGeom)
visualise(aLine, linecol = "deeppink")
# 2. sketch a line
if(dev.interactive()){
aLine <- gs_line(vertices = 4)
visualise(aLine, linecol = "orange", linewidth = 5, new = FALSE)
}Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.