[R] interp function in package akima

[Sacha Viquerat]

hello! does anyone know how to get values out of an interp object (from 
akima package)? ive constructed an elevation map and would like to 
numerically see the calculated z values of data points, which were not 
empirically sampled (basically: id like to see the altitude at locations 
x,y which have been computed by the interp function. is there any way? 
thanks in advance!