dataf {ddalpha} | R Documentation

## Converts data from fdata class to the functional class.

### Description

fda.usc contains a handy function `fdata` that converts varios types of functional data to the `fdata` class. To use these data in `ddalphaf.train` it must first be converted with `dataf`.

The function may be used either to convert a fdata object that contains multiple classes, or to convert multiple fdata objects, each of which contains one class.

Note that `fdata$fdata2d = TRUE` is not supported.

### Usage

    dataf(fdatas, labels)

### Arguments

`fdatas` | an `fdata` object with curves belonging to multiple classes, or a list of `fdata` objects, each of which contains curves of the same class
`labels` | a list of labels of the functional observations. If `fdatas` is a single `fdata` object, the list contains labels for each curve. If `fdatas` is a list of `fdata` objects, the list labels for each of these `fdata` objects.

### Format

The functional data as a data structure (see `dataf.*`).

`dataf`

  The functional data as a list of objects. Each object is characterized by two coordinates

  `args`

    The arguments vector

  `vals`

    The values vector

`labels`

  The classes of the objects

### See Also

`dataf.*` for the functional data format.

`ddalphaf.train` to train the functional DDα-classifier

`compclassf.train` to train the functional componentwise classifier

`plot.functional` for building plots of functional data

### Examples

    ## Not run:
    library(fda.usc)
    data(phoneme)

    # 1. convert a fdata object that contains multiple classes.
    #    labels are defined for each curve
    converted = dataf(phoneme$learn, phoneme$classlearn)
    plot.functional(converted)

    # 2. convert multiple fdata objects, each of which contains one class
    #    the same label is applied to all curves of each fdata object
    converted = dataf(list(phoneme$learn, phoneme$test), c("1 red", "2 blue"))
    converted$name = "Phoneme learn (red) and test (blue)"
    plot.functional(converted)

    ## End(Not run)

[Package ddalpha version 1.3.9 Index]