`scipy.signal._ltisys:step`

source: build-install/usr/lib/python3.14/site-packages/scipy/signal/_ltisys.py:2382

Signature

def step(system, X0 = None, T = None, N = None)

Summary

Step response of continuous-time system.

Parameters

system : an instance of the LTI class or a tuple of array_like

describing the system. The following gives the number of elements in the tuple and the interpretation:

1 (instance of lti)
2 (num, den)
3 (zeros, poles, gain)
4 (A, B, C, D)

X0 : array_like, optional

Initial state-vector (default is zero).

T : array_like, optional

Time points (computed if not given).

N : int, optional

Number of time points to compute if T is not given.

Returns

T : 1D ndarray: Output time points.
yout : 1D ndarray: Step response of system.

Notes

If (num, den) is passed in for system, coefficients for both the numerator and denominator should be specified in descending exponent order (e.g. s^2 + 3s + 5 would be represented as [1, 3, 5]).

Examples

from scipy import signal
import matplotlib.pyplot as plt
lti = signal.lti([1.0], [1.0, 1.0])
t, y = signal.step(lti)

✓

plt.plot(t, y)
plt.xlabel('Time [s]')
plt.ylabel('Amplitude')
plt.title('Step response for 1. Order Lowpass')

✗

Text(0.5, 1.0, 'Step response for 1. Order Lowpass')

plt.grid()

✓

Aliases

scipy.signal.step