Usage: 
  physics-exp [options] direct  
  physics-exp [options] indirect <functions>

Options:
  -e ERROR        a file define error to calculate[default:0],also can be list,
                  (this parament only used in direct)
  --f-d DFILE     a file define data list for calculate
                  (the last line mast be ERROR)

Message:
    <functions>     define calculate function and differential, DIFFERENTIALS is a function list
                    FUNCTIONS is a function
    input format    input format and file format need like these:
                            x 12.2 12 23.4 32
                            y 23.3 3  32    6.6
                            e 223 3223 2322 3232
    error line      error line must be the last line in file and in input line
                    if your specify the --f-d , you should use -e
lovely by mpsss.