Description Usage Arguments Value Warning See Also

View source: R/univariateExpansions.R

This function calculates an inverse (orthonormal) discrete cosine
transformation for given coefficients in two dimensions using the
C-library `fftw3`

(see http://www.fftw.org/). As many
coefficients are expected to be zero, the values are given in
compressed format (indices and values only of non-zero coefficients).

1 |

`scores` |
A numeric vector, containing the non-zero coefficients. |

`ind` |
An integer vector, containing the indices of the non-zero coefficients. |

`dim` |
A numeric vector of length 2, giving the resulting image dimensions. |

A matrix of dimensions `dim`

, which is a linear
combination of cosine tensor basis functions with the given
coefficients.

If the C-library `fftw3`

is not available when
the package `MFPCA`

is installed, this function is disabled an
will throw an error. For full functionality install the C-library
`fftw3`

from http://www.fftw.org/ and reinstall
`MFPCA`

. This function has not been tested with
ATLAS/MKL/OpenBLAS.

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