Z-Plane

A handful of freqeuntly used plots when working with discrete systems or digital signal processing in Pyton. Z-Plane is built upon the scipy.signal module, using the TransferFunction class to pass all required system information to plot functions in a single object. This allows all plots to be executed in a single line of code, while Z-Plane handles the calculations and setup required to get the perfect plot.

The following functions are available:

• freq: Normalized frequency response
• pz: Pole-Zero plot
• bode: Bode plot (Gain and Phase), non logarithmic frequency axis possible
• impulse: Impulse response
• norm: Normalize transfer function
• fir2tf: Get FIR transfer function from impulse response

Installation

pip install zplane

Use

• Import zplane
• Call any of the available functions, and pass a valid scipy.signal TransferFunction

Have a look at the examples for a quick demonstration on how to use the functions. Please look up the TransferFunction documentation, if you are unsure how to create a valid instance of a TransferFunction.