@map_history(variable)
This is a special form: the argument must be a variable identifier. It
returns a map where the keys are integers and the values are the
successive values assigned to the variable. Integer 0
corresponds to
the current value, 1
to the previous value, etc. Variable's history
has a bounded length that can be specified using a @local
or a@global
declaration.
See also @tab_history, @map_history_date and @map_history_rdate.
See also system related functions: @arch_darwin, @arch_linux, @arch_windows, @dumpvar, @exe_child_of, @exe_parent, @gnuplot, @history_length, @loadvalue, @loadvar, @plot, @rplot, @savevalue, @set_osc_handling_double, @set_osc_handling_int64, @set_osc_handling_tab, @specified_duration, @string2fun, @string2obj, @string2proc, @system