[SciPy-User] Difference equation to frequency response?

[Matti Viljamaa]

What’s a simple way to get the frequency response of a filter that’s expressed as difference equation using SciPy?

Such as this lowpass filter:

https://kiritchatterjee.wordpress.com/2014/11/10/a-simple-digital-low-pass-filter-in-c/ <https://kiritchatterjee.wordpress.com/2014/11/10/a-simple-digital-low-pass-filter-in-c/>

y[i] = b * x[i] + (1-b) * y[i-1]
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