| xyz.coords {graphics} | R Documentation |
Utility for obtaining consistent x, y and z coordinates and labels for three dimensional (3D) plots.
xyz.coords(x, y, z, xlab=NULL, ylab=NULL, zlab=NULL, log=NULL,
recycle=FALSE)
x, y, z |
the x, y and z coordinates of a set of points.
Alternatively, a single argument x can be provided.
In this case, an attempt is made to interpret the
argument in a way suitable for plotting.
If the argument is a formula zvar ~ xvar + yvar,
xvar, yvar and zvar are used as x, y and z
variables;
if the argument is a list containing components x,
y and z, these are assumed to define plotting coordinates;
if the argument is a matrix with three columns, the first is
assumed to contain the x values, etc.
Alternatively, two arguments x and y can be provided.
One may be real, the other complex;
in any other case, the arguments are coerced to vectors
and the values plotted against their indices.
|
xlab, ylab, zlab |
names for the x, y and z variables to be extracted. |
log |
character, "x", "y", "z" or combinations.
Sets negative values to NA and gives a warning. |
recycle |
logical; if TRUE, recycle (rep) the
shorter ones of x, y or z if their lengths differ. |
A list with the components
x |
numeric (i.e., double) vector of abscissa values. |
y |
numeric vector of the same length as x. |
z |
numeric vector of the same length as x. |
xlab |
character(1) or NULL, the axis label of x. |
ylab |
character(1) or NULL, the axis label of y. |
zlab |
character(1) or NULL, the axis label of z. |
Uwe Ligges and Martin Maechler
xy.coords for 2D.
xyz.coords(data.frame(10*1:9, -4), y = NULL, z = NULL) xyz.coords(1:6, fft(1:6), z = NULL, xlab="X", ylab="Y") y <- 2 * (x2 <- 10 + (x1 <- 1:10)) xyz.coords(y ~ x1 + x2, y = NULL, z = NULL) xyz.coords(data.frame(x=-1:9, y=2:12, z=3:13), y = NULL, z = NULL, log="xy") ##> Warning message: 2 x values <= 0 omitted ...