


TSDATA time-series object class constructor.
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DESCRIPTION: TSDATA time-series object class constructor.
Create a time-series data object.
Properties:
name - name of time-series object
fs - sample rate of data
t - time samples vector
x - x samples vector
nsecs - the length of this time-series in seconds
xunits - units to interpret the time samples (e.g., seconds)
yunits - units to interpret the data samples (e.g., Volts)
t0 - time-stamp of the first data sample in UTC format yyyy-mm-dd HH:MM:SS
created - creation time of this fsdata object. Created by the function now
version - version of the constructor code
Possible constructors:
ts = tsdata() - creates a blank time-series object
ts = tsdata(x) - creates a time-series object with the given
x-data.
ts = tsdata(t,x) - creates a time-series object with the given
(t,x)-data. The sample rate is then set as
1/(t(2)-t(1)).
ts = tsdata(x,fs) - creates a time-series object with the given
x-data. The time vector t[] is grown from the
sample rate. The first sample is assigned time 0.
HISTORY: 30-01-2007 Hewitson
Creation
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0001 function ts = tsdata(varargin) 0002 % TSDATA time-series object class constructor. 0003 % 0004 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 0005 % 0006 % DESCRIPTION: TSDATA time-series object class constructor. 0007 % Create a time-series data object. 0008 % 0009 % Properties: 0010 % name - name of time-series object 0011 % fs - sample rate of data 0012 % t - time samples vector 0013 % x - x samples vector 0014 % nsecs - the length of this time-series in seconds 0015 % xunits - units to interpret the time samples (e.g., seconds) 0016 % yunits - units to interpret the data samples (e.g., Volts) 0017 % t0 - time-stamp of the first data sample in UTC format yyyy-mm-dd HH:MM:SS 0018 % created - creation time of this fsdata object. Created by the function now 0019 % version - version of the constructor code 0020 % 0021 % Possible constructors: 0022 % ts = tsdata() - creates a blank time-series object 0023 % ts = tsdata(x) - creates a time-series object with the given 0024 % x-data. 0025 % ts = tsdata(t,x) - creates a time-series object with the given 0026 % (t,x)-data. The sample rate is then set as 0027 % 1/(t(2)-t(1)). 0028 % ts = tsdata(x,fs) - creates a time-series object with the given 0029 % x-data. The time vector t[] is grown from the 0030 % sample rate. The first sample is assigned time 0. 0031 % 0032 % HISTORY: 30-01-2007 Hewitson 0033 % Creation 0034 % 0035 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 0036 0037 ALGONAME = mfilename; 0038 VERSION = '$Id: tsdata.html,v 1.2 2007/07/10 05:37:13 hewitson Exp $'; 0039 0040 if nargin == 0 % create default tsdata object 0041 ts.name = 'None'; 0042 ts.t = []; 0043 ts.x = []; 0044 ts.fs = 0; 0045 ts.xunits = ''; 0046 ts.yunits = ''; 0047 ts.nsecs = 0; 0048 ts.t0 = '0000-00-00 00:00:00'; 0049 ts.version = VERSION; 0050 ts.created = now; 0051 ts = class(ts, 'tsdata'); 0052 elseif nargin == 1 % create tsdata with x data 0053 if isa(varargin{1}, 'tsdata') 0054 ts = varargin{1}; 0055 elseif isstruct(varargin{1}) 0056 ts = class(varargin{1}, 'tsdata'); 0057 else 0058 ts.name = 'None'; 0059 ts.t = []; 0060 ts.x = varargin{1}; 0061 ts.fs = 1; 0062 ts.xunits = ''; 0063 ts.yunits = ''; 0064 ts.nsecs = length(ts.x)/ts.fs; 0065 ts.t0 = '0000-00-00 00:00:00'; 0066 ts.version = VERSION; 0067 ts.created = now; 0068 ts = class(ts, 'tsdata'); 0069 ts = setTime(ts); 0070 if size(ts.x,2) > size(ts.x,1) 0071 ts.x = [ts.x].'; 0072 end 0073 end 0074 elseif nargin == 2 % t,x data or x,fs data 0075 if length(varargin{1}) == length(varargin{2}) && length(varargin{1})>1 0076 ts.name = 'None'; 0077 ts.t = varargin{1}; 0078 ts.x = varargin{2}; 0079 ts.fs = 1.0/(ts.t(min(2,length(ts.t)))-ts.t(1)); 0080 ts.xunits = ''; 0081 ts.yunits = ''; 0082 ts.nsecs = ts.t(end) - ts.t(1) + 1/ts.fs; 0083 ts.t0 = '0000-00-00 00:00:00'; 0084 ts.version = VERSION; 0085 ts.created = now; 0086 ts = class(ts, 'tsdata'); 0087 if size(ts.x,2) > size(ts.x,1) 0088 ts.x = [ts.x].'; 0089 end 0090 ts = reshapeT(ts); 0091 else 0092 % check we have fs properly here 0093 if length(varargin{2}) > 1 0094 error(['### unknown constructor call. Either t and x should be the' ... 0095 'same length, or fs should be a single value.']); 0096 end 0097 ts.name = 'None'; 0098 ts.t = []; 0099 ts.x = varargin{1}; 0100 ts.fs = varargin{2}; 0101 ts.xunits = ''; 0102 ts.yunits = ''; 0103 ts.nsecs = length(ts.x)/ts.fs; 0104 ts.t0 = '0000-00-00 00:00:00'; 0105 ts.version = VERSION; 0106 ts.created = now; 0107 ts = class(ts, 'tsdata'); 0108 if size(ts.x,2) > size(ts.x,1) 0109 ts.x = [ts.x].'; 0110 end 0111 ts = setTime(ts); 0112 0113 end 0114 else 0115 error('### Unknown number of constructor arguments.'); 0116 end 0117