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## control

There are two environment variables that can be defined to affect fit. The environment variables must be defined before gnuplot is executed; how to do so depends on your operating system.

          FIT_LOG

changes the name (and/or path) of the file to which the fit log will be written. The default is to write "fit.log" in the current working directory. This can be overwritten at run time using the command set fit logfile.

          FIT_SCRIPT

specifies a command that may be executed after an user interrupt. The default is replot, but a plot or load command may be useful to display a plot customized to highlight the progress of the fit. This can be changed at run time using set fit script.

For many other run time adjustments to way fit works, see set fit.