MatrixExpression
The output of this block is a matrix obtained by evaluating the matrix expression specified as a block parameter. The expression specifies the output in terms of input matrices u1,...un where ui is the ith matrix input (except if using custom input names), matrix parameters (defined in the context of the diagram), and constants. Only real matrices are supported.
Library
Activate/MatrixOperations
Description
The output of this block is a matrix obtained by evaluating the matrix expression specified as block parameter. The expression specifies the output in terms of input matrices u1,...un where ui is the ith matrix input (except if using custom input names), matrix parameters (defined in the context of the diagram) and constants.
Only real matrices are supported. OML functions can be used in the mathematical expression, as long as the value of the function can be determined in the evaluation phase.
Supported syntax is listed as following
Arithmetical operator: + - * / ^
Logical operator: | & ! ~
Relational operator: > < >= <= == ~= <>
Conditional operators: Element-wise if expression, Element-wise switch expression
Matrix operators: [] , ; (,) () : $ :=
Elementary functions: abs exp log log10 min max sign sqrt hypot
Trigonometric functions: acos acosh asin asinh atan atan2 atanh cos cosh sin sinh tan
Rounding functions: ceil floor int round
Matrix functions: eye ones zeros det expm inv logm max min size sum svd
General math functions: rem power pow
For more details, please refer to the section about Matrix Expression in the Extended Definitions for Advanced Users.Parameters
| Name | Label | Description | Data Type | Valid Values |
|---|---|---|---|---|
nin | Number of inputs | Number | ||
work | Workspace Evaluation | Hidden parameter used by the block to indicate available environemnt variables. | ||
used_names | Used names | Hidden parameter used by the block to indicate used environment variables. | ||
exx | Mathematical expression | String | ||
useinputnames | Use custom input names | Number | 0 | |
inputnames | Custom input names | The variable names of inputs. | Structure | |
inputnames/inputname | Variable name | Input variable name. | Cell of strings | |
externalActivation | External activation | Number | 0 |
Ports
| Name | Type | Description | IO Type | Number |
|---|---|---|---|---|
Port 1 | explicit | output | 1 | |
Port 2 | explicit | input | nin | |
Port 3 | activation | input | externalActivation |
Advanced Properties
| Name | Value | Description |
|---|---|---|
always active | no | |
direct-feedthrough | yes | |
zero-crossing | no | |
mode | no | |
continuous-time state | no | |
discrete-time state | no |