step (MathScript RT Module Function)
- Updated2023-03-14
- 2 minute(s) read
step (MathScript RT Module Function)
Owning Class: timeresp
Requires: Control Design and Simulation Module and MathScript RT Module
Syntax
step(SysIn)
step(SysIn, attributes)
step(SysIn, attributes, t)
[Y, T] = step(SysIn)
[Y, T] = step(SysIn, t)
[Y, T, X] = step(SysIn)
[Y, T, X] = step(SysIn, t)
Description
Creates a step response plot of the system model. You also can use this function to return the step response of the model outputs. If the model is in state-space form, you also can use this function to return the step response of the model states. This function assumes the initial model states are zero. If you do not specify an output, this function creates a plot.
Inputs
| Name | Description | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SysIn | Specifies a linear time-invariant model in transfer function, zero-pole-gain, or state-space form. | ||||||||||||||||||||||||||||||||
| attributes | Specifies valid plot attributes. Order the plot attributes by color, point-style, and line-style. For example, 'bo-' specifies that the plot is blue, marks points with circles, and uses solid lines. attributes is a string that can take a combination of the following values:
|
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| t | Specifies a uniformly spaced time vector that contains information about the initial time, time step, and final time. You can format t as [t0:dt:tf], where t0 is the initial time, dt is the time step, and tf is the final time. You also can format t as [tf]. You also can use the linramp function to generate t. t is a real vector. |
Outputs
| Name | Description |
|---|---|
| Y | Returns the time response of the outputs of the SysIn model due to the step input. Y is a real matrix. |
| T | Returns the uniformly spaced time vector this function uses to calculate the step response and the state trajectories. T is a real vector. |
| X | Returns the time response of the states of the SysIn model due to the step input. This function returns X only if the SysIn model is in state-space form. X is a real matrix. |
Details
The following table lists the support characteristics of this function.
| Supported in the LabVIEW Run-Time Engine | Yes (if you request output) |
| Supported on RT targets | Yes (if you request output) |
| Suitable for bounded execution times on RT | Not characterized |
Examples
n = 4
r = 2
m = 2
SysIn = randss(n, r, m)
step(SysIn, [0:0.01:100])