fda.usc: fdata – R documentation

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fdata

Converts raw data or other functional data classes into fdata class.

Description

Create a functional data object of class fdata from (matrix, data.frame, numeric, integer, fd, fds, fts or sfts) class data.

Usage

fdata(mdata, argvals = NULL, rangeval = NULL, names = NULL, fdata2d = FALSE)

Arguments

`mdata`	Matrix of set cases with dimension (`n` x `m`), where `n` is the number of curves and `m` are the points observed in each curve.
`argvals`	Argvals, by default: `1:m`.
`rangeval`	(optional) Range of discretization points, by default: range(`argvals`).
`names`	(optional) list with tree components: `main` an overall title, `xlab` title for `x` axis and `ylab` title for `y` axis.
`fdata2d`	TRUE class fdata2d, the functional data is observed in at least a two grids (the `argvals` is a list of vectors). By default `fdata2d=FALSE` the functional data is observed in a single grid (the `argvals` is a vector).

Value

Return fdata class object with:

"data": matrix of set cases with dimension (n x m), where n is the number of curves and m are the points observed in each curve
"rangeval": the discretizations points values, if not provided: 1:m
"rangeval": range of the discretizations points values, by default: range(argvals)
"names": (optional) list with main an overall title, xlab title for x axis and ylab title for y axis.

Author(s)

Manuel Febrero-Bande, Manuel Oviedo de la Fuente manuel.oviedo@usc.es

References

Febrero-Bande, M., Oviedo de la Fuente, M. (2012). Statistical Computing in Functional Data Analysis: The R Package fda.usc. Journal of Statistical Software, 51(4), 1-28. http://www.jstatsoft.org/v51/i04/

Examples

## Not run: 
data(phoneme)
mlearn<-phoneme$learn[1:4,1:150]
# Center curves
fdata.c=fdata.cen(mlearn)$Xcen
par(mfrow=c(2,1))
plot(mlearn,type="l")
plot(fdata.c,type="l")

# Convert  from class fda to fdata
bsp1 <- create.bspline.basis(c(1,150),21)
fd1 <- Data2fd(1:150,y=t(mlearn$data),basisobj=bsp1)
fdataobj=fdata(fd1)

# Convert  from class fds, fts or sfts to fdata
#require(fds)
#a=fds(x = 1:20, y = Simulationdata$y, xname = "x", 
# yname = "Simulated value")
#b=fts(x = 15:49, y = Australiasmoothfertility$y, xname = "Age",
#    yname = "Fertility rate")
#c=sfts(ts(as.numeric(ElNino_ERSST_region_1and2$y), frequency = 12), xname = "Month",
#yname = "Sea surface temperature")
#class(a);class(b);class(c)
#fdataobj=fdata(b)

## End(Not run)

fda.usc

Functional Data Analysis and Utilities for Statistical Computing

v2.0.2

GPL-2

Authors

Manuel Febrero Bande [aut], Manuel Oviedo de la Fuente [aut, cre], Pedro Galeano [ctb], Alicia Nieto [ctb], Eduardo Garcia-Portugues [ctb]

Initial release

2020-02-17