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fda

plot.basisfd

Plot a Basis Object

Description

Plots all the basis functions.

Usage

## S3 method for class 'basisfd'
plot(x, knots=TRUE, axes=NULL, ...)

Arguments

`x`	a basis object
`knots`	logical: If TRUE and x[['type']] == 'bspline', the knot locations are plotted using vertical dotted, red lines. Ignored otherwise.
`axes`	Either a logical or a list or `NULL`. logical whether axes should be drawn on the plot list a list used to create custom `axes` used to create axes via `x$axes[[1]]` and `x$axes[-1]`. The primary example of this uses `list("axesIntervals", ...)`, e.g., with `Fourier` bases to create `CanadianWeather` plots
`...`	additional plotting parameters passed to `matplot`.

Value

none

Side Effects

a plot of the basis functions

Examples

##
## 1.  b-spline
##
# set up the b-spline basis for the lip data, using 23 basis functions,
#   order 4 (cubic), and equally spaced knots.
#  There will be 23 - 4 = 19 interior knots at 0.05, ..., 0.95
lipbasis <- create.bspline.basis(c(0,1), 23)
# plot the basis functions
plot(lipbasis)

##
## 2.  Fourier basis
##
yearbasis3 <- create.fourier.basis(c(0,365),
                    axes=list("axesIntervals") )
#  plot the basis
plot(yearbasis3)

##
## 3.  With Date and POSIXct rangeval
##
# Date
July4.1776 <- as.Date('1776-07-04')
Apr30.1789 <- as.Date('1789-04-30')
AmRev <- c(July4.1776, Apr30.1789)
BspRevolution <- create.bspline.basis(AmRev)
plot(BspRevolution)

# POSIXct
July4.1776ct <- as.POSIXct1970('1776-07-04')
Apr30.1789ct <- as.POSIXct1970('1789-04-30')
AmRev.ct <- c(July4.1776ct, Apr30.1789ct)
BspRev.ct <- create.bspline.basis(AmRev.ct)
plot(BspRev.ct)

fda

Functional Data Analysis

v5.1.9

GPL (>= 2)

Authors

J. O. Ramsay <ramsay@psych.mcgill.ca> [aut,cre], Spencer Graves <spencer.graves@effectivedefense.org> [ctb], Giles Hooker <gjh27@cornell.edu> [ctb]

Initial release

2020-12-16