functions in df3.i - d

                df3_read(fname)  return a df3 structure  
 
    q= df3_read("./snapshot_000")  
    modified to be df3 1.1 compatible  
interpreted function, defined at ./df3.i   line 2  

            T  
 
        writes a df3 structure into the file  
        er= df3_write(s,"test.dat");  
interpreted function, defined at ./df3.i   line 77