Here’s how to use step() function.
Description:
Create a sequence by getting members from a sequence according to the specified starting position and a step.
Syntax:
A.step(m,ki,…)
Note:
The function finds the members whose sequence numbers are ki, ki+m, ki+2m,…from A to compose a new sequence.
Parameter:
|
m |
A positive integer used to specify the step |
|
ki |
The starting sequence number, 1<=ki. The default is 1 |
|
A |
A sequence whose length is n |
Return value:
Sequence
Example:
|
|
A |
|
|
1 |
[1,2,3,4,5,6,7,8,9,10] |
|
|
2 |
=A1.step(2,1) |
[1,3,5,7,9] Get members at the odd positions. |
|
3 |
=A1.step(3,1,2) |
[1,2,4,5,7,8,10] Get two every other one. |
|
=A1.step(2) |
Start from the first member when ki,… is absent. |