calcStepLength

This script was created to compute side specific step lengths during walks recorded via the {{XSENS}}. The computed steps will be written to csv files and visualized as bar charts. Further the script creates some diagrams: one showing the 3D positions of the feet including step positions during the recording. The others visualise velocities of the feet, the foot distance, step phase time spans and Z coordinates. Some example outputs are shown below.

{{exechelp::R/calcStepLength}}
A comment on the
delta argument:
This parameter is used to remove small false positive time spans. Only time spans longer than the given delta parameter will be considered in the step length calculation. The default value is 20 milliseconds.
velepsilon argument:
This parameter is used to separate the standing foot from the moving foot. Therefore the mean values of the top 20 and low 20 percent is calculated and the middle between the two mean values is used as epsilon. You may use a personal epsilon value instead by using this optional argument.
distepsilon argument:
This parameter is used together with velepsilon to determine the standing position of a foot. The calculation is the same and you may also use a personal value with this optional argument.

Computed step lengths and diagrams for Walk05

{{gallery::images/diagrams/walk05/info-calc.txt?w220}}
{{table::images/diagrams/walk05/steplengths.csv}}
Computed steplengths from Walk05.

Computed step lengths and diagrams for Walk06

{{gallery::images/diagrams/walk06/info-calc.txt?w220}}
{{table::images/diagrams/walk06/steplengths.csv}}
Computed steplengths from Walk07.

Computed step lengths and diagrams for Walk07

{{gallery::images/diagrams/walk07/info-calc.txt?w220}}
{{table::images/diagrams/walk07/steplengths.csv}}
Computed steplengths from Walk07.

Computed step lengths and diagrams for Walk10

{{gallery::images/diagrams/walk07/info-calc.txt?w220}}
{{table::images/diagrams/walk10/steplengths.csv}}
Computed steplengths from Walk10.