step (Control Design and Simulation Module, MathScript Function)
Member of the timeresp class.
Syntax
step(SysIn, attributes)
step(SysIn, attributes, 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 linspace 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. |
Examples
n = 4
r = 2
m = 2
SysIn = rss(n, r, m)
step(SysIn, [0:0.01:100])