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C++ API

: val = history_control ()

: old_val = history_control (new_val)

Query or set the internal variable that specifies how commands are saved to the history list.

The default value is an empty character string, but may be overridden by the environment variable OCTAVE_HISTCONTROL.

The value of history_control is a colon-separated list of values controlling how commands are saved on the history list. If the list of values includes ignorespace, lines which begin with a space character are not saved in the history list. A value of ignoredups causes lines matching the previous history entry to not be saved. A value of ignoreboth is shorthand for ignorespace and ignoredups. A value of erasedups causes all previous lines matching the current line to be removed from the history list before that line is saved. Any value not in the above list is ignored. If history_control is the empty string, all commands are saved on the history list, subject to the value of history_save.

See also: history_file, history_size, history_timestamp_format_string, history_save.

Package: octave