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

In fda.usc: Functional Data Analysis and Utilities for Statistical Computing

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 [e-mail]

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. https://www.jstatsoft.org/v51/i04/

See Also

See Also as plot.fdata

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 documentation built on Oct. 17, 2022, 9:06 a.m.