Hello, I am looking for an interpolation method similar to the one-dimensional AKIMA interpolation as in Akima (1970). Is there already such an algorithm in R which I may have overlooked? Thank you in advance Thomas P. H. Akima, A new method of interpolation and smooth curve fitting based on local procedures, J. Assoc. Comput. Mach. 17, 589-602, 1970.