How to find the difference between two column in two netcdf files

I have two NetCDF files of global radiation data (721x361x491). The files have lon, lat, time and radiation columns. I want to subract just the radiation columns in the two files and then write a third netCDF file with the difference in radiation as the new radiation column. Please, how do I do this? Any assistance will be highly apprecaited.

Answer 1

[KSSV]

1. You have to read netCDf files. Read about ncdisp, ncread.
2. Load the data of two files into two variables.
3. Get the difference using -.
4. Write the data into netCDF file using ncrwrite.