Paint tiles on ternary plot

Function to fill a ternary plot with coloured tiles. Useful in combination with TernaryPointValues() and TernaryContour().

TernaryTiles(
  x,
  y,
  down,
  resolution,
  col,
  direction = getOption("ternDirection", 1L)
)

Arguments

x, y

Numeric vectors specifying x and y coordinates of centres of each triangle.

down

Logical vector specifying TRUE if each triangle should point down (or right), FALSE otherwise.

resolution

The number of triangles whose base should lie on the longest axis of the triangle. Higher numbers will result in smaller subdivisions and smoother colour gradients, but at a computational cost.

col

Vector specifying the colour with which to fill each triangle.

direction

(optional) Integer specifying the direction that the current ternary plot should point: 1, up; 2, right; 3, down; 4, left.

Value

TernaryTiles() is called for its side effect – painting a ternary plot with coloured tiles. It invisibly returns NULL.

See also

Other functions for colouring and shading: ColourTernary()

Author

Martin R. Smith (martin.smith@durham.ac.uk)

Examples

TernaryPlot()
TernaryXRange()
#> [1] -0.5  0.5
TernaryYRange()
#> [1] -0.0669873  0.9330127

TernaryTiles(0, 0.5, TRUE, 10, "red")
xy <- TernaryCoords(c(4, 3, 3))
TernaryTiles(xy[1], xy[2], FALSE, 5, "darkblue")