l_layer_contourLines: Layer Contour Lines

In loon: Interactive Statistical Data Visualization

Layer Contour Lines

Description

This function is a wrapper around contourLines that adds the countourlines to a loon plot which is based on the cartesian coordinate system.

Usage

l_layer_contourLines(
  widget,
  x = seq(0, 1, length.out = nrow(z)),
  y = seq(0, 1, length.out = ncol(z)),
  z,
  nlevels = 10,
  levels = pretty(range(z, na.rm = TRUE), nlevels),
  asSingleLayer = TRUE,
  parent = "root",
  index = "end",
  ...
)

Arguments

widget	widget path as a string or as an object handle
x, y	As described in grDevices::contourLines: locations of grid lines at which the values in z are measured. These must be in ascending order. By default, equally spaced values from 0 to 1 are used. If x is a list, its components x$x and x$y are used for x and y, respectively. If the list has component z this is used for z.
z	As described in grDevices::contourLines: a matrix containing the values to be plotted (NAs are allowed). Note that x can be used instead of z for convenience.
nlevels	As described in grDevices::contourLines: number of contour levels desired iff levels is not supplied.
levels	As described in grDevices::contourLines: numeric vector of levels at which to draw contour lines.
asSingleLayer	if TRUE a lines layer is used for the line, otherwise if FALSE a group with nested line layers for each line is created
parent	a valid Tk parent widget path. When the parent widget is specified (i.e. not NULL) then the plot widget needs to be placed using some geometry manager like tkpack or tkplace in order to be displayed. See the examples below.
index	position among its siblings. valid values are 0, 1, 2, ..., 'end'
...	arguments forwarded to l_layer_line

Details

For more information run: l_help("learn_R_layer.html#countourlines-heatimage-rasterimage")

Value

layer id of group or lines layer

Examples

if(interactive()){

p <- l_plot()
x <- 10*1:nrow(volcano)
y <- 10*1:ncol(volcano)
lcl <- l_layer_contourLines(p, x, y, volcano)
l_scaleto_world(p)

if (requireNamespace("MASS", quietly = TRUE)) {

  p1 <- with(iris, l_plot(Sepal.Length~Sepal.Width, color=Species))
  lcl <- with(iris, l_layer_contourLines(p1, MASS::kde2d(Sepal.Width,Sepal.Length)))

  p2 <- with(iris, l_plot(Sepal.Length~Sepal.Width, color=Species))
  layers <- sapply(split(cbind(iris, color=p2['color']), iris$Species), function(dat) {
       kest <- with(dat, MASS::kde2d(Sepal.Width,Sepal.Length))
       l_layer_contourLines(p2, kest, color=as.character(dat$color[1]), linewidth=2,
            label=paste0(as.character(dat$Species[1]), " contours"))
  })
}

}

loon documentation built on July 9, 2023, 5:48 p.m.