(
(
c
Dyadic (Two-Argument) Form: Rotate A
<1>
[I]
Bar
A<1>B
or
AsB
The rotate function rotates the elements
of
argument B the number
of
positions
specified by argument
A.
If
argument A
is
positive, then the elements
of
argument B are rotated
to
the left (rows), or upward (columns). If A
is
negative,
the
elements are rotated
to
the
right (rows), or downward (columns). Argument B
can be any expression. The shape
of
the
result
is
the same as
that
of
argument
B.
When argument B
is
a multidimensional array, the index entry
[I]
can be used
to
specify the coordinate
that
is
acted on. If the index entry
is
omitted, the last co-
ordinate (column)
is
acted on. If the
AsB
form
is
used,
then
the first coordinate
is
acted on.
If
argument B
is
a vector, then argument A must be a scalar
or
single-element array.
If argument-B
is
a matrix, then argument A must be a scalar
or
vector. When
argument A
is
a vector, the number
of
elements
in
argument A must be
the
same
as
the
number
of
elements
in
the coordinate being rotated. For example, if B
is
a 3
by 4 matrix (each row has four elements) and
the
row coordinate
is
specified, A
must have four elements:
2<1>:1.
2 3
4·
5..--
3 4 5
5
'!2:1
2 3
I.J.
5
(2--1~
4-
5
:I.
2 3
3
4·
'7(~:I.
2 3
I.~
5
31+~5:1.2
B~3
4-p
1 2 3
~
5 6
'7
8 9
10
11
:1.2
B
:I.
2
:5
56'7
9
:1.0
:1.1
1
()
52'7
9 6
1.1
1.
10
3
o
:I.
:I.
2
:3
6
"7
B
11
:1.2
9
o
:I.
:I.
2 3
6
"7
B
:1.:1.
12
9
:t.
0
527
9
6:1.1
1 10 3
A~"~"1
f~
-1.
()
"':1.
-2
i
The first coordinate (rows)
is
specified;
1+
therefore, the rotation
is
between rows.
8
~:
2$r.1JB
r:: r 1
[:2
~
J
lOJJ
2<1>[2:1B
I.~
\
!7j
'-------The
second coordinate (columns)
is
specified;
:1.0
2<J)B
therefore, the rotation
is
between columns.
L~'
5
'------The
last coordinate
is
acted on.
:1.0
1
2eB
12
LI·
\"-----The
first coordinate
is
acted on.
S
01.2
9
:I.
A(~[1]B
2 1.l B
3
12
'7
L~
6
5
1.
0
91
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