Program control flow

Credits	Overview	Plotting Styles	Commands	Terminals

New syntax if ... else if ... else ...
XDG base directory conventions for configuration preferences are supported. The program reads initial commands from $XDG_CONFIG_HOME/gnuplot/gnuplotrc. Session command history is saved to $XDG_STATE_HOME/gnuplot_history. If these files are not found, $HOME/.gnuplot and $HOME/.gnuplot_history are used as in previous gnuplot versions.
unset warnings suppresses output of warning messages to stderr.
warn "message" prints filename, line number and message to stderr.
Exception handling for the "fit" command. Control always returns to the next line of input, even in the case of fit errors. On return, FIT_ERROR is non-zero if an error occurred. This allows scripted recovery from a bad fit. See fit error_recovery.