A function called by cov.interp.fft to allocate and perform interpolation of covariate infomation onto the FFT grid
aggregateCovariateInfo(cellidx, cidx, gidx, df, fftovl, classes, polyareas)the index of the cell
index of covariate, no longer used
grid index
the data frame containing the covariate information
an overlay of the fft grid onto the SpatialPolygonsDataFrame or SpatialPixelsDataFrame objects
vector of class attributes of the dataframe
polygon areas of the SpatialPolygonsDataFrame or SpatialPixelsDataFrame objects
the interpolated covariate information onto the FFT grid