MATSUM

Sum of Matrix’s Elements

Block Screenshot

Contents

• `Sum of Matrix’s Elements`_ +

  • Palette
  • Description
  • Dialog box
  • Default properties
  • Interfacing function
  • Computational function
  • See also

Palette

• Matrix operation palette

Description

The MATSUM block returns the sum of the element of an input matrix/vector.

When the Sum along is set to:

• 0 (all) the block outputs the sum of all the elements of the matrix. The output is then a scalar.
• 1 (lines) the block is a row-wise sum. The output is a row vector.
• 2 (Columns) the block is a column-wise sum. The output is a column vector.

The equivalent function of this block in Scilab is `sum`_.

Dialog box

• Datatype(1=real double 2=Complex) It indicates the type of the output. It support only the two types double (1) and complex (2). If we input another entry in this label xcos will print the message “Datatype is not supported”. Properties : Type ‘vec’ of size 1.
• Sum along (0=all 1=lines 2=Columns) Indicates the used rule to sum. For more information see the description part. Properties : Type ‘vec’ of size 1.

Default properties

• always active: no
• direct-feedthrough: yes
• zero-crossing: no
• mode: no
• regular inputs: - port 1 : size [-1,-2] / type 1
• regular outputs: - port 1 : size [1,1] / type 1
• number/sizes of activation inputs: 0
• number/sizes of activation outputs: 0
• continuous-time state: no
• discrete-time state: no
• object discrete-time state: no
• name of computational function: mat_sum

Interfacing function

• SCI/modules/scicos_blocks/macros/MatrixOp/MATSUM.sci

Computational function

• SCI/modules/scicos_blocks/src/c/mat_sum.c
• SCI/modules/scicos_blocks/src/c/mat_suml.c
• SCI/modules/scicos_blocks/src/c/mat_sumc.c
• SCI/modules/scicos_blocks/src/c/matz_sum.c
• SCI/modules/scicos_blocks/src/c/matz_suml.c
• SCI/modules/scicos_blocks/src/c/matz_sumc.c

See also

• SUBMAT - Sub-matrix extraction (xcos Block)
• SUMMATION - Matrix Summation (xcos Block)
• sum (Scilab function)