I want to ask that how to interpolate grid data to specific points? My question is similar to this, but I'd like to try to achieve it in R since I forget details in python.
In my case, X and Y represent longitude and latitude, while Z represent monthly precipitation data. One uncertainty is that is it reasonable to not consider elevation data? I see from some literature that they created gridded precipitation data from station data, without considering elevation data.
If Z represent temperature, how to change the code and to consider elevation data? Thanks for your help.