A .m()

Read(186) Label: get, specified position, member,

Description:

Get members at specified positions.

Syntax:

A.m(i)

-n<=i<=n and i is not equal to 0; 1<=i<=n indicates getting the ith member; -n<=i<=-1 indicates getting the ith member from the bottom

A.m(P)

P is a non-zero n-integer sequence

Note:

A is a sequence whose length is n, from which you get members at specified positions. The function is generally used to get members reversely from a sequence.

Parameters:

A

A sequence expression

i

An integer

P

A non-zero n-integer sequence

Options:

@r

Turn back if the specified position exceeds the boundary of A, that is, to set i=if(i%n==0,n,i%n), where n is the length of A.

@0

The member represented by a sequence number that exceeds the boundary of A will be excluded from the result.

Return value:

A value or a sequence composed of the members at the specified positions in sequence A

Example:

 

A

 

1

[a,b,c,d,e,f,g,h,i,j]

 

2

=A1.m(2)

b

3

=A1.m(-2)

i

4

=A1.m([2,3])

[b,c]

5

=A1.m([-2,-3])

[i,h]

6

=A1.m@0([5,12])

[e]

7

=A1.m@r([5,12])

[e,b]

Related functions:

A.p()