hello! i'm dealing with the following: i've collected a factor covariable at irregularly placed sampling points along a line with spatial informations, i.e.: dataset<-c(x-coordinates, y-coordinates, level-of-factor) the factor describes the density of vegetation between 0 (no ground cover) and 5 (almost complete cover). id like to produce a map similar to the ones the akima package enables me to (function in akima is called: interp(x,y,z-value...), then use image(...) on the resulting data). but: as the akima library works suitable with continuous z-values (topography, air pressure, whatever is measured can be described a number), my resulting map looks terribly patchy (of course, since the levels of the factor cannot be interpolated) and contains no valuable information. thus my question: i imagine something like a "growing-cells mechanism", which lets every sample grow until its "borders" touch the borders of an adjacent sample, resulting in something like a honeycomb-structure. that would give me a cellular pattern of my factor spread across the map!