`fit' program to manipulate with the HRPT data and more... By Markus Zolliker, PSI.

fit>help

 Available fit functions:
   1-20 Gaussian, Lorentzian or Gaussian folded with Lorentzian
   Critical exponents, Strange peaks, User defineable functions
  
 Data files supported:
   TASMAD, NeXus (DMC, HRPT, FOCUS, MARS, RITA)
   ASCII multicolumn format, SICS ascii,
   LNS Powder Ascii, TASCOM, Fullprof plot output
   5c2, INX, IDA, 2T, PANDA, CCL
  
 Most fit commands can also be linked to a user FORTRAN program.
  
 Report bugs & wishes to markus.zolliker@psi.ch
  
 Topic                                    Available keyword
 -----------------------------------------------------------------------------
 Command syntax                           "commands"
 Features in plot window                  "graphics"
 New features since 1990                  "history"
 Programming your own user function       "user_function"  "cinfo"  "init"
 Control FIT from a FORTRAN program       "callable"
 Fortran interface of any FIT command     fit_X (where X is any FIT command)
 Datafile specific options                "opt"
  
 Commands             Available keywords
 -----------------------------------------------------------------------------
 fitting commands:    "fit" "mig" "sim" "epsi" "vtest" "err" "pri"
 function definiton:  "fun" "auto" "newpeak"
 parameter handling:  "set" "lim" "fix" "cor" "rel" "fcn" "reserr"
 input:               "load" "dat" "link" "next" "opt"
 output:              "save" "file" "out" "list" "export"
 fit region:          "win" "exclude" "include" "keep"
 data manipulation:   "mon" "merge" "mul" "sub" "add" "abskor" "trans" "bgedit"
 plot:                "plot" "scal" "rsc" "choose" "plog" "plin" "file"
 plot style:          "bars" "connect" "style" "colors" "legend"
 miscellaneous:       "help" "info" "exit" "tit" "@"