Here’s how to use pmax() function.
Description:
Get the positions of members with the maximum value in a sequence.
Syntax:
A.pmax( x)
Note:
The function computes expression x with each member of sequence A and returns the ordinal numbers of the members whose computations are the maximum. Can be used to find positions of the maximum value in a sequence.
Parameter:
|
A |
A sequence |
|
x |
A field name or an expression, in which "~" is used to reference the current record. |
Option:
|
@a |
Return ordinal numbers of all members that make expression x get the largest value. When omitted, only return the ordinal number of the first member. |
|
@z |
Perform the search backwards from the last member; by default perform the search from the first member. |
Return value:
A ordinal number or a sequence composed of ordinal numbers
Example:
|
|
A |
|
|
1 |
[2,5,4,3,2,9,4,9,3] |
|
|
2 |
=A1.pmax(~*~) |
6 |
|
3 |
=A1.pmax@a(~*~) |
[6,8] |
|
4 |
=A1.pmax@z(~*~) |
8 |
|
5 |
=A1.pmax@az(~*~) |
[8,6] |
|
6 |
=demo.query("select * from EMPLOYEE ") |
|
|
7 |
=A6.pmax(BIRTHDAY) |
472 |
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