From b99f1f1a0b1ade216eefea43abdcf6e2a8d9d835 Mon Sep 17 00:00:00 2001
From: David Rotermund <54365609+davrot@users.noreply.github.com>
Date: Thu, 16 Nov 2023 18:27:57 +0100
Subject: [PATCH] Create README.md

Signed-off-by: David Rotermund <54365609+davrot@users.noreply.github.com>
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+# [scipy.signal](https://docs.scipy.org/doc/scipy/reference/signal.html) -- Butterworth low, high and band-pass
+## Goal
+
+Sometimes we need to remove of frequency range from a time series. For this we can use a Butterworth filter [scipy.signal.butter](https://docs.scipy.org/doc/scipy/reference/generated/scipy.signal.butter.html) and the [scipy.signal.filtfilt](https://docs.scipy.org/doc/scipy/reference/generated/scipy.signal.filtfilt.html) command. 
+
+Questions to [David Rotermund](mailto:davrot@uni-bremen.de)