With this script you can represent and customize altitude profiles from .gpx files using Matlab. To smooth the profile, the Moving mean function is used. It's important to select the length of the moving mean window based on the GPS signal quality through the window_percent parameter. This parameter represents the window length as a percentage of the total number of GPS samples.
Some examples to compare the effect of varying the parameter window_percent:
$$ \overline{|GPS-Filtered|} = 0.271m $$
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