Description:
Get members of a sequence according to the ordinal numbers of members of an integer sequence to create a new sequence.
Syntax:
A(p)
Note:
Here are sequence A whose lengh is n and the integer sequence p whose length is m. Get members in p and use their values as ordinal numbers to get members in A in order to generate a new sequence.
Parameter:
|
p |
An integer sequence; the range of its member values is ≥0 and ≤n. If P is an empty sequence, then return an empty sequence. |
|
A |
A sequence whose length is n |
Return value:
A sequence
Example:
|
|
A |
|
|
1 |
[a,b,c,d,e,f,g] |
|
|
2 |
[1,3,5] |
|
|
3 |
=A1(A2) |
[a,c,e] |
|
4 |
[1,3,5,10] |
|
|
5 |
=A1(A4) |
Report errors, as the index is out-of-bound. |
|
6 |
=A1([]) |
[] |
|
7 |
=A1([1,2,3,3]) |
[a,b,c,c] |
Related function: