Unterschiede
Hier werden die Unterschiede zwischen zwei Versionen angezeigt.
| Beide Seiten der vorigen RevisionVorhergehende ÜberarbeitungNächste Überarbeitung | Vorhergehende Überarbeitung | ||
| wiki:mathematica [2015/05/15 11:37] – martinr | wiki:mathematica [2015/05/15 12:09] (aktuell) – martinr | ||
|---|---|---|---|
| Zeile 4: | Zeile 4: | ||
| You may want to react on error messages created by a called function. For instance if you open a file and it cannot be opened. | You may want to react on error messages created by a called function. For instance if you open a file and it cannot be opened. | ||
| - | < | + | < |
| Check[expr, | Check[expr, | ||
| </ | </ | ||
| evaluates expr, and returns the result, unless messages were generated, in which case it evaluates and returns failexpr. | evaluates expr, and returns the result, unless messages were generated, in which case it evaluates and returns failexpr. | ||
| + | < | ||
| Check[expr, | Check[expr, | ||
| + | </ | ||
| checks only for the specified messages. | checks only for the specified messages. | ||
| + | < | ||
| Check[expr, | Check[expr, | ||
| + | </ | ||
| checks only for messages in the named message group. | checks only for messages in the named message group. | ||
| Example: | Example: | ||
| - | Check[(a=<<" | + | < |
| + | Check[(a=<<" | ||
| + | </ | ||
