feat(loadardu): base implementation of loadardu

loadardu.m

+function arduData = loadardu(arduFile)
+    % LOADARDU Load the Arduino data and clean it.
+    %   This function loads the Arduino data. Then it:
+    %       - removes the unneeded columns
+    %       - convert time into milliseconds
+    %       - converts the output into an array instead of a table
+    %       - calculates the power
+    %       - re-aligns the angles properly from the raw wing positions
+    % -----
+    % Output format:
+    %   The output array has one row per timestep. The columns are ordered as follows:
+    %       angleFrontLeft, angleFrontRight, angleAftLeft, angleAftRight, powerFront, powerAft
+    %
+    % Syntax:
+    %   arduData = loadardu(arduFile) load the Arduino data file, then clean it and return a cleaned
+    %   version with only the relevant fields in form of an array.
+    %
+    % Inputs:
+    %   arduFile: Arduino file.
+    %
+    % Outputs:
+    %   arduData: Array with the cleaned data.
+    %
+    % See also: readdata.
+
+    % ----------------------------------------------------------------------------------------------
+    % TODO: Check for inconsistencies in the table
+    % ----------------------------------------------------------------------------------------------
+    % (c) Copyright 2022 University of Liege
+    % Author: Thomas Lambert <t.lambert@uliege.be>
+    % ULiege - Aeroelasticity and Experimental Aerodynamics
+    % MIT License
+    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+    % Load data
+    arduTable = table;
+    if ~isempty(arduFile)
+        arduTable = loadcsv(['arduinoFiles/', arduFile, '.csv']);
+    end
+
+    % Time conversion
+    arduTable.time = timetomilli(arduTable.time);
+
+    % Remove data with duplicate timecode
+    [~, idx] = unique(arduTable.time); % indexes of unique timecodes
+
+    arduTable = arduTable(idx, :);
+
+    % Convert into table
+    arduData = table2array(arduTable);
+
+    % Calculate power, remove tension and current
+    power = arduData(:, [5, 7]) .* arduData(:, [6, 8]);
+    arduData(:, 5:end) = [];
+    arduData = [arduData, power];
+
+    % Recalculate angles properly
+
+end
+
+function rawTable = loadcsv(file)
+    % LOADCSV Load the csv into a table
+
+    % Tweak options before import
+    opts = detectImportOptions(file);
+    opts.VariableNamesLine = 1;
+
+    opts.SelectedVariableNames = {'x_RXDate_Time', 'x1_Left_field6_', 'x1_Right_field7_', ...
+                                  'x2_Left_field8_', 'x2_Right_field9_', 'x1_Tension_field14_', ...
+                                  'x1_Current_field15_', 'x2_Tension_field16_', ...
+                                  'x2_Current_field17_'};
+    opts.DataLines = [2 Inf];
+
+    % Import
+    rawTable = readtable(file, opts);
+
+    % Rename columns
+    rawTable.Properties.VariableNames = {'time', 'angleFrontLeft', 'angleFrontRight', ...
+                                         'angleAftLeft', 'angleAftRight', ...
+                                         'tensionF', 'currentF', 'tensionA', 'currentA'};
+
+end
+
+function timeMilli = timetomilli(time)
+    % TIMETOMILLI Converts datetime data into milliseconds since start
+
+    % Parse time properly
+    time = datetime(time, 'InputFormat', 'uuuu/MM/dd''/ ''HH:mm:ss::SSS', 'TimeZone', 'UTC');
+
+    % Converts into difference from the first time
+    timeMilli = milliseconds(time - time(1)) + 1; % Shift of 1 so first time is 1 millisecond
+
+end