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Manuel Scilab >> xcos > palettes > Matrix operation palette > MATBKSL

# MATBKSL

left matrix division

### Description

The MATBKSL block outputs the left matrix division. It is a solution to A*x=B. The higher input is the A matrix, the lower one is the B matrix, and the output is x. If A is an M-by-N1 matrix, B must be a M-by-N2 where N1 and N2 can be different or equal. The output x is a N1-by-N2 matrix.

The equivalent of BACKSLASH is "ïn Scilab.

### 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.

### Example

```A=[1 7 3;23 32 29]
B=[21 18;13 10]
then the result of the A*x=B equation is (A\B):
x=[-4.504 -3.922;3.643 3.132;0.000 0.000]```

### Default properties

• always active: no

• direct-feedthrough: yes

• zero-crossing: no

• mode: no

• regular inputs:

- port 1 : size [-1,-2] / type 1

- port 2 : size [-1,-3] / type 1

• regular outputs:

- port 1 : size [-2,-3] / 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_bksl

### Interfacing function

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

### Computational function

• SCI/modules/scicos_blocks/src/c/mat_bksl.c

• SCI/modules/scicos_blocks/src/c/matz_bksl.c