Add several netcdf files of the same dimension

Is there a tool in ioapi (m3tool) that can add multiple netcdf files of the same dimension?

nc1(four dimensions,6 variables)+nc2(four dimensions,6 variables)+nc3(four dimensions,6 variables)=nc4(four dimensions,6 variables(add same variables))

Can the professor give me some hints? tks.

See, particularly
m3combo which does general linear combinations (of which sums are a special case), and m3diff which does 2-file sums and differences.

That worked, thanks for your response.