scalapackfx_tools_module::blocklist Type Reference

List of the local blocks of a distributed matrix. More...

Private Member Functions
procedure	init => blocklist_init
	Initializes the instance.
procedure	getsize => blocklist_getsize
	Returns the size of the blocklist.
procedure	getblock => blocklist_getblock
	Returns the indices (local and global) of a local block.

Detailed Description

List of the local blocks of a distributed matrix.

This structure can be helpful when modifying a distributed matrix directly on the local nodes. For example, in order to multiply every column of a distributed matrix by a column dependent factor, you could use the blocklist the following way:

type(blocklist) :: blocks
integer :: ii, jj, jglob, jloc, bsize
:
call blocks%init(mygrid, descaa, "c")
do ii = 1, size(blocks)
  call blocks%getblock(ii, jglob, jloc, bsize)
  do jj = 0, bsize  - 1
    aa(:,jloc + jj) =  aa(:,jloc + jj) * ff(jglob + jj)
  end do
end do

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The documentation for this type was generated from the following file:

• scalapackfx_tools.F90