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- delete_history([index])
-
:: Deletes the history.
- return
-
0
- index
-
Index of history to be deleted.
-
Deletes all the histories without an argument.
-
Deletes the history with index index if specified.
-
A history is an expression which has been obtained by evaluating an input
given for a prompt with an index. It can be taken out by
@index,
which means that the expression survives garbage collections.
-
A large history may do harm in the subsequent memory management and
deleting the history by
delete_history(), after saving it in a file
by bsave(), is often effective.
[0] (x+y+z)^100$
[1] @0;
...
[2] delete_history(0);
[3] @0;
0
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