# Plot a Basis Object Plots all the basis functions. ```r ## 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`. ## Returns none ## Side Effects a plot of the basis functions ## References Ramsay, James O., Hooker, Giles, and Graves, Spencer (2009), **Functional data analysis with R and Matlab**, Springer, New York. Ramsay, James O., and Silverman, Bernard W. (2005), **Functional Data Analysis, 2nd ed.**, Springer, New York. Ramsay, James O., and Silverman, Bernard W. (2002), **Applied Functional Data Analysis**, Springer, New York. ## See Also `plot.fd` ## Examples ```r oldpar <- par(no.readonly=TRUE) ## ## 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) par(oldpar) ```

plot.basisfd function