binning the maximum value of station

[Stefan Fronzek]

Hello,

I would like to bin station data into grid cells using the maximum value for
those cells that contain several stations. The oabin() command only allows
to bin the average value (no flag) or the first value (f-flag) of several
stations or the number of stations per grid cell (c-flag). Ideally, I would
want oabin() to support an additional flag for using the maximum value. Can
anybody give hints on how to do this task?

Best regards,
Stefan