calcStepTimeAsymmetry.m

% This function is part of the NMSM Pipeline, see file for full license.
%
% This function calculates step time asymmetry. Step time asymmetry is
% calculated as the ratio between single support times, therefore a step 
% time asymmetry of 1 represent symmetry. 
%
% (struct, struct, struct) -> (Number)
%


function stepTimeAsymmetry = calcStepTimeAsymmetry(values, ...
    modeledValues, params)

for i = 1:length(params.contactSurfaces)
    if i == 1
        singleSupportTime(i) = calcSingleSupportTime( ...
            modeledValues.groundReactionsLab.forces{i + 1}(:, 2), ...
            values.time);
    else
        singleSupportTime(i) = calcSingleSupportTime( ...
            modeledValues.groundReactionsLab.forces{i - 1}(:, 2), ...
            values.time);
    end
end
stepTimeAsymmetry = singleSupportTime(1) / singleSupportTime(2);
end