Convert coordinates of a point in ternary space, in the format (a, b, c), to x and y coordinates of Cartesian space, which can be sent to standard functions in the 'graphics' package.
TernaryCoords(
abc,
b_coord = NULL,
c_coord = NULL,
direction = getOption("ternDirection", 1L),
region = getOption("ternRegion", ternRegionDefault)
)# S3 method for matrix
TernaryToXY(
abc,
b_coord = NULL,
c_coord = NULL,
direction = getOption("ternDirection", 1L),
region = getOption("ternRegion", ternRegionDefault)
)
# S3 method for numeric
TernaryToXY(
abc,
b_coord = NULL,
c_coord = NULL,
direction = getOption("ternDirection", 1L),
region = getOption("ternRegion", ternRegionDefault)
)
TernaryToXY(
abc,
b_coord = NULL,
c_coord = NULL,
direction = getOption("ternDirection", 1L),
region = getOption("ternRegion", ternRegionDefault)
)
TernaryCoords()
returns a vector of length two that converts
the coordinates given in abc
into Cartesian (x, y) coordinates
corresponding to the plot created by the last call of TernaryPlot()
.
A vector of length three giving the position on a ternary plot
that points in the direction specified by direction
(1 = up, 2 = right,
3 = down, 4 = left). c(100, 0, 0)
will plot in the direction
-most
corner; c(0, 100, 0)
will plot in the corner clockwise of direction
;
c(0, 0, 100)
will plot in the corner anti-clockwise of direction
.
Alternatively, the a coordinate can be specified as the first parameter,
in which case the b and c coordinates must be specified via b_coord
and c_coord
.
Or, a matrix with three rows, representing in turn the a
, b
and c
coordinates of points.
The b coordinate, if abc
is a single number.
The c coordinate, if abc
is a single number.
(optional) Integer specifying the direction that the current ternary plot should point: 1, up; 2, right; 3, down; 4, left.
(optional) Named list of length two specifying the the
min
imum and max
imum values of each ternary axis to be drawn
(e.g. list(min = c(40, 0, 0), max = c(100, 60, 60)
);
or a set of coordinates in a format accepted by TernaryPoints()
.
The plotted region will correspond to the smallest equilateral triangle
that encompasses the specified ranges or coordinates.
TernaryPlot()
Other coordinate translation functions:
ReflectedEquivalents()
,
TriangleCentres()
,
XYToTernary()
TernaryCoords(100, 0, 0)
TernaryCoords(c(0, 100, 0))
coords <- matrix(1:12, nrow = 3)
TernaryToXY(coords)
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