Developer Reference

  • 2020.2
  • 07/15/2020
  • Public Content
Contents

?lacpy

Copies all or part of one two-dimensional array to another.

Syntax

call slacpy
(
uplo
,
m
,
n
,
a
,
lda
,
b
,
ldb
)
call dlacpy
(
uplo
,
m
,
n
,
a
,
lda
,
b
,
ldb
)
call clacpy
(
uplo
,
m
,
n
,
a
,
lda
,
b
,
ldb
)
call zlacpy
(
uplo
,
m
,
n
,
a
,
lda
,
b
,
ldb
)
Include Files
  • mkl.fi
Description
The routine copies all or part of a two-dimensional matrix
A
to another matrix
B
.
Input Parameters
The data types are given for the Fortran interface.
uplo
CHARACTER*1
.
Specifies the part of the matrix
A
to be copied to
B
.
If
uplo
=
'U'
, the upper triangular part of
A
;
if
uplo
=
'L'
, the lower triangular part of
A
.
Otherwise, all of the matrix
A
is copied.
m
INTEGER
.
The number of rows in the matrix
A
(
m
0
).
n
INTEGER
.
The number of columns in
A
(
n
0
).
a
REAL
for
slacpy
DOUBLE PRECISION
for
dlacpy
COMPLEX
for
clacpy
DOUBLE COMPLEX
for
zlacpy
.
Array
a
(
lda
,*)
, contains the
m
-by-
n
matrix
A
.
The second dimension of
a
must be at least
max(1,
n
)
.
If
uplo
=
'U'
, only the upper triangle or trapezoid is accessed; if
uplo
=
'L'
, only the lower triangle or trapezoid is accessed.
lda
INTEGER
.
The leading dimension of
a
;
lda
max(1,
m
).
ldb
INTEGER
.
The leading dimension of the output array
b
;
ldb
max(1,
m
)
.
Output Parameters
b
REAL
for
slacpy
DOUBLE PRECISION
for
dlacpy
COMPLEX
for
clacpy
DOUBLE COMPLEX
for
zlacpy
.
Array
b
(
ldb
,*), contains the
m
-by-
n
matrix
B
.
The second dimension of
b
must be at least
max(1,
n
)
.
On exit,
B
=
A
in the locations specified by
uplo
.