102 lines
6.1 KiB
Matlab
102 lines
6.1 KiB
Matlab
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function SyncroniseData(varargin)
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%SYNCRONISEDATA Syncronises time series data between xIMUdataClass objects
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%
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% SyncroniseData(xIMUdataStruct, StartEventTimes)
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% SyncroniseData(xIMUdataStruct, StartEventTimes, EndEventTimes)
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% SyncroniseData(xIMUdataStruct, 'UseAX0fallingEdge')
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%
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% This fuction syncronises time series data between xIMUdataClass objects
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% by adjusting the StartTime and SampleRate properties of each data
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% class.
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%
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% StartEventTimes is vector of values representing the time at which a
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% 'start synchronisation event' common to all xIMUdataClass objects is
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% known to occur within each xIMUdataClass object's time series data. The
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% length of this vector must equal the number of xIMUdataClass objects
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% in xIMUdataStruct.
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%
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% EndEventTimes is vector of values representing the time at which a
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% 'end synchronisation event' common to all xIMUdataClass objects is
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% known to occur within each xIMUdataClass object's time series data. The
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% length of this vector must equal the number of xIMUdataClass objects
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% in xIMUdataStruct.
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%
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% 'UseAX0fallingEdge' should be specified if a falling edge of the
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% auxilary port (configured in digital I/O mode) channel AX0 represents
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% the 'start synchronisation event' or 'start synchronisation event' and
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% 'end synchronisation event'.
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%% Apply arguments
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xIMUdata = varargin{1};
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xIMUdataObjs = struct2cell(xIMUdata);
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StartEventTimes = [];
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EndEventTimes = [];
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UseAX0fallingEdge = false;
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if(ischar(varargin{2}))
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if strcmp(varargin{2}, 'UseAX0fallingEdge'), UseAX0fallingEdge = true;
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else error('Invalid argument.');
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end
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else
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StartEventTimes = varargin{2};
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if(nargin == 3)
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EndEventTimes = varargin{3};
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end
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end
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%% Use AX0 falling edge of auxiliary port in Digital I/O mode
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if(UseAX0fallingEdge)
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for i = 1:numel(xIMUdataObjs)
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fallingEdgeIndexes = [0; diff(xIMUdataObjs{i}.DigitalIOdata.State.AX0)] == -1;
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fallingEdgeTimes = xIMUdataObjs{i}.DigitalIOdata.Time(fallingEdgeIndexes);
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StartEventTimes = [StartEventTimes; fallingEdgeTimes(1)];
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if(numel(fallingEdgeTimes) > 1)
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EndEventTimes = [EndEventTimes; fallingEdgeTimes(end)];
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end
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end
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end
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%% Modify start times to synchronise start of window
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if(numel(StartEventTimes) ~= numel(xIMUdataObjs))
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error('Length of StartEventTimes vector must equal number of xIMUdataClass objects');
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end
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for i = 1:numel(xIMUdataObjs)
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try h = xIMUdataObjs{i}.DateTimeData; h.StartTime = -StartEventTimes(i); catch e, end
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try h = xIMUdataObjs{i}.RawBatteryAndThermometerData; h.StartTime = -StartEventTimes(i); catch e, end
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try h = xIMUdataObjs{i}.CalBatteryAndThermometerData; h.StartTime = -StartEventTimes(i); catch e, end
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try h = xIMUdataObjs{i}.RawInertialAndMagneticData; h.StartTime = -StartEventTimes(i); catch e, end
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try h = xIMUdataObjs{i}.CalInertialAndMagneticData; h.StartTime = -StartEventTimes(i); catch e, end
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try h = xIMUdataObjs{i}.QuaternionData; h.StartTime = -StartEventTimes(i); catch e, end
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try h = xIMUdataObjs{i}.RotationMatrixData; h.StartTime = -StartEventTimes(i); catch e, end
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try h = xIMUdataObjs{i}.EulerAnglesData; h.StartTime = -StartEventTimes(i); catch e, end
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try h = xIMUdataObjs{i}.DigitalIOdata; h.StartTime = -StartEventTimes(i); catch e, end
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try h = xIMUdataObjs{i}.RawAnalogueInputData; h.StartTime = -StartEventTimes(i); catch e, end
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try h = xIMUdataObjs{i}.CalAnalogueInputData; h.StartTime = -StartEventTimes(i); catch e, end
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try h = xIMUdataObjs{i}.RawADXL345busData; h.StartTime = -StartEventTimes(i); catch e, end
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try h = xIMUdataObjs{i}.CalADXL345busData; h.StartTime = -StartEventTimes(i); catch e, end
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end
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%% Modify sample rate to synchronise end of window
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if(numel(EndEventTimes) == 0)
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return;
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end
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if(numel(EndEventTimes) ~= numel(xIMUdataObjs))
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error('Length of EndEventTimes vector must equal number of xIMUdataClass objects');
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end
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scalers = (EndEventTimes - StartEventTimes) * (1/((EndEventTimes(1)-StartEventTimes(1))));
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for i = 2:numel(xIMUdataObjs)
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try h = xIMUdataObjs{i}.DateTimeData; h.SampleRate = scalers(i)*h.SampleRate; h.StartTime = StartEventTimes(i)/scalers(i); catch e, end
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try h = xIMUdataObjs{i}.RawBatteryAndThermometerData; h.SampleRate = scalers(i)*h.SampleRate; h.StartTime = StartEventTimes(i)/scalers(i); catch e, end
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try h = xIMUdataObjs{i}.CalBatteryAndThermometerData; h.SampleRate = scalers(i)*h.SampleRate; h.StartTime = StartEventTimes(i)/scalers(i); catch e, end
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try h = xIMUdataObjs{i}.RawInertialAndMagneticData; h.SampleRate = scalers(i)*h.SampleRate; h.StartTime = StartEventTimes(i)/scalers(i); catch e, end
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try h = xIMUdataObjs{i}.CalInertialAndMagneticData; h.SampleRate = scalers(i)*h.SampleRate; h.StartTime = -StartEventTimes(i)/scalers(i); catch e, end
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try h = xIMUdataObjs{i}.QuaternionData; h.SampleRate = scalers(i)*h.SampleRate; h.StartTime = StartEventTimes(i)/scalers(i); catch e, end
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try h = xIMUdataObjs{i}.RotationMatrixData; h.SampleRate = scalers(i)*h.SampleRate; h.StartTime = StartEventTimes(i)/scalers(i); catch e, end
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try h = xIMUdataObjs{i}.EulerAnglesData; h.SampleRate = scalers(i)*h.SampleRate; h.StartTime = StartEventTimes(i)/scalers(i); catch e, end
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try h = xIMUdataObjs{i}.DigitalIOdata; h.SampleRate = scalers(i)*h.SampleRate; h.StartTime = StartEventTimes(i)/scalers(i); catch e, end
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try h = xIMUdataObjs{i}.RawAnalogueInputData; h.SampleRate = scalers(i)*h.SampleRate; h.StartTime = StartEventTimes(i)/scalers(i); catch e, end
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try h = xIMUdataObjs{i}.CalAnalogueInputData; h.SampleRate = scalers(i)*h.SampleRate; h.StartTime = StartEventTimes(i)/scalers(i); catch e, end
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try h = xIMUdataObjs{i}.RawADXL345busData; h.SampleRate = scalers(i)*h.SampleRate; h.StartTime = StartEventTimes(i)/scalers(i); catch e, end
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try h = xIMUdataObjs{i}.CalADXL345busData; h.SampleRate = scalers(i)*h.SampleRate; h.StartTime = StartEventTimes(i)/scalers(i); catch e, end
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end
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end
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