Created a simple example script for showing HR plot.

example.py

@@ -0,0 +1,12 @@
+from analyze_sport_data import heart_rate_dataframe
+from analyze_sport_data.file_records import from_fit_file
+from matplotlib.pyplot import show
+from os import scandir
+
+data = [
+    from_fit_file(file.path, file.name) for file in scandir(".")
+    if file.name.endswith(".fit") and file.is_file()
+]
+
+heart_rate_dataframe(data).plot()
+show()