C-PLOT

Contents → Fitting → Commands summary

← Prev | Next →

The fit functions are interactive processes in their own right. Some of the commands recognized by the fits work the same way as the corresponding C-PLOT commands. Those unique to the fit process are explained in this chapter. A table of all the available commands is presented on the following page.

As in the plot program, all fit commands are one- or two-letter mnemonics. In table that follows, italic parameters are to be replaced with the appropriate characters for the desired instruction. Optional parameters appear in square brackets. When several parameters are shown separated by vertical lines, you use only one of them with the command. For commands that simply indicate options, consult the detailed command description for an explanation of the syntax.

Command   Description   2d|3d   Select data exchange mode   cd [directory]   Change directory1   ch [p#=value ...]   Calculate chi squared   do [cmdfile]   Take commands from file1   em   End making a command file1   er   Erase the video screen1   ex   Exit the fit program1   fc   Set fit criteria and fit options   fi [options]   Fit the data points3   fv [value]   Set fit verbosity   gd [options]   Get data points2   gp   Get parameter values   h   Get on-line help1   lm [# [low high]]   Set parameter constraints   md [x [y]] [o] [p#=v ...]   Make data   mk cmdfile   Make a command file   mr [x [y]] [/] [p#=v ...]   Make residuals   pg [x [y]]   Get points from the plot program4   ps [x [y]]   Send points to the plot program4   ra [0|#]   Select range to fit   rp [file|. [#]]   Read parameters from a file   sa [file[a|w]]   Save data points1,3   sA [file[a|w]]   Save plot points3   sf [file[a|w]]   Save full parameters1,3   sF [file[a|w]]   Save full parameters and errors3   sp [file[a|w]]   Save parameters3   sP [file[a|w]]   Save parameters and errors3   u [command]   Create a subshell1   vp   Select parameters to vary   wt [i|s|n|u]   Select how to weight data points

1The commands cd, do, em, er, ex, h , sa and u use the same syntax as the plot program. Consult the previous chapters for descriptions.

2The gd command uses the same syntax as the plot program but only implements modes 1, 2 and 3. Provisions are made for reading additional independent variables if the user's function requires them.

3The commands fi, sA, sP, sF, sa, sf and sp can have their output directed to a file in addition to the terminal screen. The syntax is

cmd cmd_options > filename
cmd cmd_options >> filename

The first example will open filename for writing, and the second will append to filename. In either case, if filename is the single character . the same file is used as before, and the output is appended.

4The commands pg and ps are only available when the fit process is run as a user function from the plot program.

Top ↑

← Prev | Next →