sectionDataFiles.m

% This function is part of the NMSM Pipeline, see file for full license.
%
% This function cuts the data files into the sections outlined with the
% number of frames indicated
%
% Inputs -
%   prefix - string name of trial
%   fileName - string path of file
%   timePairs - 2D array of size N x 2
%
% (string, string, string, string) -> (None)
% Makes new EMG data files with columns matching the file given


function sectionDataFiles(fileNames, timePairs, numRows, prefix)
import org.opensim.modeling.Storage
for i=1:length(fileNames)
    storage = Storage(fileNames(i));
    data = storageToDoubleMatrix(storage);
    time = findTimeColumn(storage);
    columnNames = getStorageColumnNames(storage);
    for j=1:size(timePairs, 1)
        [filepath, name, ext] = fileparts(fileNames(i));
        [newData, newTime] = cutData(data, time, timePairs(j,1), ...
            timePairs(j,2), numRows);
        newFileName = insertAfter(name, prefix, "_" + num2str(j));
        writeToSto(columnNames, newTime, newData', fullfile(filepath, ...
            newFileName + ext));
    end
end
end

function [newData, newTime] = cutData(data, time, startTime, endTime, ...
    numRows)
newTime = linspace(startTime, endTime, numRows);
newData = spline(time, data, newTime);
end