BUILT-IN MATHEMATICA SYMBOL
Sow
Sow[e]
specifies that e should be collected by the nearest enclosing Reap.
Sow[e, tag]
specifies that e should be collected by the nearest enclosing Reap whose pattern matches tag.
Sow[e, {tag1, tag2, ...}]
specifies that e should be collected once for each pattern that matches a 
.
- Sow[e, ...] returns e.
- By having several identical
, a single expression can be made to appear multiple times in a list returned by Reap.
- Sow[e] is equivalent to Sow[e, None].
- Sow[e, {{tag}}] sows an expression with tag {tag}.
Evaluate a sequence of expressions, "sowing" some to be collected by Reap:
| Out[1]= |  |
Compute a sum, "sowing" 
at each step:
| Out[1]= |  |
Make separate lists for expressions "sown" with different tags:
| Out[1]= |  |
Reap only expressions "sown" with tag 
:
| Out[1]= |  |
New in 5
