# Update

Note: This command is DEPRECATED. Use save fit instead.

The update command remains in version 5.2 for backwards compatibility but will be removed in later versions.

Syntax:

         update <filename> {<filename>}

This command updates the current values of variables stored in the given file, which must be formatted as an initial-value file (see fit (p. )).

If the file does not exist, a new file is created containing all currently defined user variables. All variables not used in the last fit are marked as `"`#FIXED`"`. This is useful for saving the current values of fit variables for later use or for restarting a converged or stopped fit.

If a second filename is supplied, the updated values are written to this file, and the original parameter file is left unmodified.

Otherwise, if the file already exists, gnuplot first renames it by appending .old and then opens a new file. That is, `"`update 'fred'`"` behaves the same as `"`!rename fred fred.old; update 'fred.old' 'fred'`"`.