Plot a Functional Data Object

Plot a Functional Data Object

DESCRIPTION:

Functional data observations, or a derivative of them, are plotted. These may be either plotted simultaneously, as matplot does for multivariate data, or one by one with a mouse click to move from one plot to another. The function also accepts the other plot specification arguments that the regular plot does.

USAGE:

plot.fd(fd, Lfd=0, matplt=T, href=T, nx=101, xlab=xlabel, ylab=ylabel, xlim=rangex, ylim=rangey, ...)

REQUIRED ARGUMENTS:

fd
A functional data object.

OPTIONAL ARGUMENTS:

Lfd
Either a nonnegative integer or a linear differential operator object. If present, the derivative or the value of applying the operator is plotted rather than the functions themselves.
matplt
A logical variable. If TRUE, the observations are all plotted simultaneously. If not, they are plotted one by one, with a mouse click to move to the next plot.
href
A logical variable. If TRUE, a horizontal dotted line is plotted at zero.
nx
The number of points to use to define the plot. The default is usually enough, but for a highly variable function more may be required.
xlab
A label for the abscissa.
ylab
A label for the ordinate.
xlim
Axis limits for the abscissa.
ylim
Axis limits for the ordinate.
...
Additional arguments that can be used in all plotting programs.

VALUE:

A plot of the functional data. Note that for multivariate data, a suitable array must first be defined using the par function.

DETAILS:

SEE ALSO:

lines.fd, plotfit.fd

EXAMPLES:

#  plot all the temperature functions for the monthly weather data
plot(tempfd, main="Temperature Functions")
#  plot each temperature function in turn, advancing by a click
plot(tempfd, matplt=F)