The C++ code, of this package take to run from the data two main information. the coefficient in the basis expansion of the functional data, and the inner product between theses basis. cppMultidata made this task in the multivariate case.
1  cppMultiData(mfd)

mfd 
a list containing all dimension of the data 
fdData a list that containing the concatenation of the transpose of the coefficients matrix and a block diagonal matrix where each block is the inner product between the basis functions.
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