algebra: OPTIONS

SYNTAX-CHECK

New instructions entered via INSERT are checked by default (ALGEBRA-SYNTAX-CHECK) on correct syntax as part of a sequential algebra instruction list, which can in principle be executed entirely within the ALGEXn routines.

The instruction codes for return, goto, argument and call are processed at a higher level. Such instruction codes are used for instance when addressing elements of matrices. These codes are accepted only if you have set PROCEDURE-SYNTAX-CHECK.

You may change also switch syntax checking off altogether.

IGNORE-UNDERFLOW

By default, exponentials of negative numbers less than -88 are signaled as underflows. Formulae in which they occur are not evaluated.

To have such exponentials set to 0 and to continue evaluating the formula, the IGNORE-UNDEFLOW option is used.

When IGNORE-UNDERFLOW is in effect, underflows are not counted.

Note: this option applies only to exponentials evaluated by algebraic expressions, not to exponentials computed by regular Garfield commands.

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Formatted on 15/01/01 at 23:07.