mfd classLet us show how the funcharts package works through an
example with the dataset air, which has been included from
the R package FRegSigCom and is used in the paper of Qi and
Luo (2019).
mfd
classWe provide the mfd class for multivariate functional
data. It inherits from the fd class but provides some
additional features:
coef argument to be an array even when
the number of functional observations and/or the number of functional
variables are one[ that never drops
dimensions, then it always returns a mfd object with
three-dimensional array argument coef; moreover it allows
extracting observations/variables also by nameThe first thing is to get the mfd object from discrete
data. We currently allow two types of input with the two functions:
get_mfd_data.frame: first input must be a data.frame in
the long format, with:
arg column giving the argument (x)
values,id column indicating the functional
observation,y valuesget_mfd_list: first input must be a list of matrices
for the case all functional data are observed on the same grid, which:
In this example, the dataset air is in the second format
(list of matrices, with data observed on the same grid)