LI-COR LI-6400, Руководство пользователя

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LPL Topics
Math Functions
23-22 Using the LI-6400
23
on the top of the stack can also be any of these three items. In our reference
section shorthand, we express these possibilities by
Items in <> brackets, separated by a vertical bar (for example < a | b >) means
Òone or the other ofÓ. Thus, <a | b> means a or b. ÒNObjÓ means numerical
object: DOUBLE, LONG, or NAddr.
When a Two Object Transform operates on numeric target targetNum , the re-
sult resultNum will be DOUBLE or LONG, depending on the keyword, and
depending on type (DOUBLE or LONG) of the original value.
When the target is an address targetVal or targetArray , the address remains
on the stack, while the value(s) of the variable or array are subject to change.
When the top item on the stack is array d , but the target is not ( targetVal or
targetNum ), the transform is done using each element in d , with the targetVal
or targetNum holding the cumulative result. For example, you can sum Array
d by the expression
0 d +
(Note that the reverse order (Ò d 0 + Ó) would simply add 0 to each element
of d , accomplishing nothing). Table 23-7 summarizes the combinations
Initial: Num targetNum, <NObj c | Array d>
Final: DOUBLE or LONG resultNum
or
Initial: NAddr targetVal,<NObj c | Array d>
Final: NAddr targetVal
or
Initial: Array targetArr, <NObj c | Array d>
Final: Array targetArr
Table 23-7. Two Object Transform combinations
Target
Object Top-of-Stack Object
Num NAddr Array
Num Resulting value left on stack Transform performed multiple times, once
for each array item. Resulting value left on
stack.