Array, contains the following conversion parameters:

If

job

[0]

=0

, the matrix in the CSR format is converted to the coordinate format;

if

job

[0]

=1

, the matrix in the coordinate format is converted to the CSR format.

if

job

[0]

=2

, the matrix in the coordinate format is converted to the CSR format, and the column indices in CSR representation are sorted in the increasing order within each row.

If

job

[1]

=0

, zero-based indexing for the matrix in CSR format is used;

if

job

[1]

=1

, one-based indexing for the matrix in CSR format is used.

If

job

[2]

=0

, zero-based indexing for the matrix in coordinate format is used;

if

job

[2]

=1

, one-based indexing for the matrix in coordinate format is used.

job

[4]

=

nzmax

- maximum number of the non-zero elements allowed if

job

[0]

=0

.

job

[5]

- job indicator.

For conversion to the coordinate format:

If

job

[5]

=1

, only array

rowind

is filled in for the output storage.

If

job

[5]

=2

, arrays

rowind

,

colind

are filled in for the output storage.

If

job

[5]

=3

, all arrays

rowind

,

colind

,

acoo

are filled in for the output storage.

For conversion to the CSR format:

If

job

[5]

=0

, all arrays

acsr

,

ja

,

ia

are filled in for the output storage.

If

job

[5]

=1

, only array

ia

is filled in for the output storage.

If

job

[5]

=2

, then it is assumed that the routine already has been called with the

job

[5]

=1

, and the user allocated the required space for storing the output arrays

acsr

and

ja

.

Dimension of the matrix

A

.

Specifies the number of non-zero elements of the matrix

A

for

job

[0]

≠

0

.

Refer to

nnz

description in Coordinate Format for more details.

(input/output)

Array containing non-zero elements of the matrix

A

. Its length is equal to the number of non-zero elements in the matrix

A

. Refer to

values

array description in Sparse Matrix Storage Formats for more details.

(input/output). For

job

[1] = 1

(one-based indexing for the matrix in CSR format), array containing the column indices plus one for each non-zero element of the matrix

A

.

For

job

[1] = 0

(zero-based indexing for the matrix in CSR format), array containing the column indices for each non-zero element of the matrix

A

.

Its length is equal to the length of the array

acsr

. Refer to

columns

array description in Sparse Matrix Storage Formats for more details.

(input/output). Array of length

n

+ 1

, containing indices of elements in the array

acsr

, such that

ia

[

i

] -

ia

[0]

is the index in the array

acsr

of the first non-zero element from the row

i

. The value of the last element

ia

[

n

] -

ia

[0]

is equal to the number of non-zeros plus one. Refer to

rowIndex

array description in Sparse Matrix Storage Formats for more details.

(input/output)

Array containing non-zero elements of the matrix

A

. Its length is equal to the number of non-zero elements in the matrix

A

. Refer to

values

array description in Sparse Matrix Storage Formats for more details.

(input/output). Array of length

nnz

, contains the row indices for each non-zero element of the matrix

A

.

Refer to

rows

array description in Coordinate Format for more details.

(input/output). Array of length

nnz

, contains the column indices for each non-zero element of the matrix

A

. Refer to

columns

array description in Coordinate Format for more details.

Returns the number of converted elements of the matrix

A

for

job

[0]

=0

.

Integer info indicator only for converting the matrix

A

from the CSR format.

If

info

=0

, the execution is successful.

If

info

=1

, the routine is interrupted because there is no space in the arrays

acoo

,

rowind

,

colind

according to the value

nzmax

.