--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/testing/utp_1.1/utps/ao/utp_ao_fixfs.m	Tue Dec 06 18:42:11 2011 +0100
@@ -0,0 +1,887 @@
+% UTP_AO_FIXFS a set of UTPs for the ao/fixfs method
+%
+% M Hewitson 06-08-08
+%
+% $Id: utp_ao_fixfs.m,v 1.19 2011/08/22 05:04:49 hewitson Exp $
+%
+
+% <MethodDescription>
+%
+% The fixfs method of the ao class resamples time-series AOs to have a
+% fixed sample rate.
+%
+% </MethodDescription>
+
+function results = utp_ao_fixfs(varargin)
+
+  % Check the inputs
+  if nargin == 0
+
+    % Some keywords
+    class   = 'ao';
+    mthd    = 'fixfs';
+
+    results = [];
+    disp('******************************************************');
+    disp(['****  Running UTPs for ' class '/' mthd]);
+    disp('******************************************************');
+
+    % Test AOs
+    [at1,at2,at3,at4,at5,at6,atvec,atmat] = eval(['get_test_objects_' class]);
+
+    % Exception list for the UTPs:
+    [ple1,ple2,ple3,ple4,ple5,ple6] = get_test_ples();
+
+    % Run the tests
+    results = [results utp_01];    % getInfo call
+    results = [results utp_02];    % Vector input
+    results = [results utp_03];    % Matrix input
+    results = [results utp_04];    % List input
+    results = [results utp_05];    % Test with mixed input
+    results = [results utp_06];    % Test history is working
+    results = [results utp_07];    % Test the modify call works
+    results = [results utp_08];    % Test the data shape
+    results = [results utp_09];    % Test output of the data
+    results = [results utp_10];    % Test multiple 'fs' for multiple input AOs
+    
+    results = [results utp_11(mthd, at1, ple1)];    % Test plotinfo doesn't disappear    
+    
+    results = [results utp_12];    % Test with plist: method == 'samples'
+    results = [results utp_13];    % Test with antialising filter
+    results = [results utp_14];    % Test AO with non evenly sampled data
+    
+    disp('Done.');
+    disp('******************************************************');
+
+  elseif nargin == 1 % Check for UTP functions
+    if strcmp(varargin{1}, 'isutp')
+      results = 1;
+    else
+      results = 0;
+    end
+  else
+    error('### Incorrect inputs')
+  end
+
+  %% UTP_01
+
+  % <TestDescription>
+  %
+  % Tests that the getInfo call works for this method.
+  %
+  % </TestDescription>
+  function result = utp_01
+
+
+    % <SyntaxDescription>
+    %
+    % Test that the getInfo call works for no sets, all sets, and each set
+    % individually.
+    %
+    % </SyntaxDescription>
+
+    try
+      % <SyntaxCode>
+      % Call for no sets
+      io(1) = eval([class '.getInfo(''' mthd ''', ''None'')']);
+      % Call for all sets
+      io(2) = eval([class '.getInfo(''' mthd ''')']);
+      % Call for each set
+      for kk=1:numel(io(2).sets)
+        io(kk+2) = eval([class '.getInfo(''' mthd ''', ''' io(2).sets{kk} ''')']);
+      end
+      % </SyntaxCode>
+      stest = true;
+    catch err
+      disp(err.message)
+      stest = false;
+    end
+
+    % <AlgoDescription>
+    %
+    % 1) Check that getInfo call returned an minfo object in all cases.
+    % 2) Check that all plists have the correct parameters.
+    %
+    % </AlgoDescription>
+
+    atest = true;
+    if stest
+      % <AlgoCode>
+      % check we have minfo objects
+      if isa(io, 'minfo')
+        %%% SET 'None'
+        if ~isempty(io(1).sets), atest = false; end
+        if ~isempty(io(1).plists), atest = false; end
+        %%% Check all Sets
+        if ~any(strcmpi(io(2).sets, 'Default')), atest = false; end
+        if numel(io(2).plists) ~= numel(io(2).sets), atest = false; end
+        %%%%%%%%%%   SET 'Default'
+        if io(3).plists.nparams ~= 4, atest = false; end
+        % Check key
+        if ~io(3).plists.isparam('fs'), atest = false; end
+        if ~io(3).plists.isparam('method'), atest = false; end
+        if ~io(3).plists.isparam('filter'), atest = false; end
+        if ~io(3).plists.isparam('interpolation'), atest = false; end
+        % Check default value
+        if ~isequal(io(3).plists.find('fs'), -1), atest = false; end
+        if ~strcmpi(io(3).plists.find('method'), 'time'), atest = false; end
+        if ~isequal(io(3).plists.find('filter'), 'off'), atest = false; end
+        if ~isequal(io(3).plists.find('interpolation'), 'spline'), atest = false; end
+        % Check options
+        if ~isequal(io(3).plists.getOptionsForParam('fs'), {-1}), atest = false; end
+        if ~isequal(io(3).plists.getOptionsForParam('method'), {'time', 'samples'}), atest = false; end
+        if ~isequal(io(3).plists.getOptionsForParam('interpolation'), {'nearest', 'linear', 'spline', 'cubic'}), atest = false; end
+      end
+      % </AlgoCode>
+    else
+      atest = false;
+    end
+
+    % Return a result structure
+    result = utp_prepare_result(atest, stest, dbstack, mfilename);
+  end % END UTP_01
+
+  %% UTP_02
+
+  % <TestDescription>
+  %
+  % Tests that the fixfs method works with a vector of AOs as input.
+  %
+  % </TestDescription>
+  function result = utp_02
+
+    % <SyntaxDescription>
+    %
+    % Test that the fixfs method works for a vector of AOs as input.
+    %
+    % </SyntaxDescription>
+
+    try
+      % <SyntaxCode>
+      avec = [at1 at5 at6];
+      out  = fixfs(avec);
+      % </SyntaxCode>
+      stest = true;
+    catch err
+      disp(err.message)
+      stest = false;
+    end
+
+    % <AlgoDescription>
+    %
+    % 1) Check that the number of elements in 'out' is the same as
+    %    the number in the input.
+    % 2) Check that each output AO contains the correct data.
+    %
+    % </AlgoDescription>
+
+    atest = true;
+    if stest
+      % <AlgoCode>
+      % Check we have the correct number of outputs
+      if numel(out) ~= numel(avec), atest = false; end
+      % Check the output data
+      for kk = 1:numel(avec)
+        fs = avec(kk).fs;
+        t0 = 0;
+        Nsecs = avec(kk).data.nsecs;
+        t = t0 + [0:1/fs:Nsecs-1/fs].';
+        y = interp1(avec(kk).x,avec(kk).y, t, 'spline', 'extrap');
+        if ~isequal(y, out(kk).y), atest = false; end
+        if ~isequal(t, out(kk).x), atest = false; end
+      end
+      % </AlgoCode>
+    else
+      atest = false;
+    end
+
+    % Return a result structure
+    result = utp_prepare_result(atest, stest, dbstack, mfilename);
+  end % END UTP_02
+
+  %% UTP_03
+
+  % <TestDescription>
+  %
+  % Tests that the fixfs method works with a matrix of AOs as input.
+  %
+  % </TestDescription>
+  function result = utp_03
+
+    % <SyntaxDescription>
+    %
+    % Test that the fixfs method works for a matrix of AOs as input.
+    %
+    % </SyntaxDescription>
+
+    try
+      % <SyntaxCode>
+      amat = [at1 at5 at6; at5 at6 at1];
+      out  = fixfs(amat);
+      % </SyntaxCode>
+      stest = true;
+    catch err
+      disp(err.message)
+      stest = false;
+    end
+
+    % <AlgoDescription>
+    %
+    % 1) Check that the number of elements in 'out' is the same as
+    %    the number in the input.
+    % 2) Check that each output AO contains the correct data.
+    %
+    % </AlgoDescription>
+
+    atest = true;
+    if stest
+      % <AlgoCode>
+      % Check we have the correct number of outputs
+      if numel(out) ~= numel(amat), atest = false; end
+      % Check the output data
+      for kk = 1:numel(amat)
+        fs = amat(kk).fs;
+        t0 = 0;
+        Nsecs = amat(kk).data.nsecs;
+        t = t0 + [0:1/fs:Nsecs-1/fs].';
+        y = interp1(amat(kk).x,amat(kk).y, t, 'spline', 'extrap');
+        if ~isequal(y, out(kk).y), atest = false; end
+        if ~isequal(t, out(kk).x), atest = false; end
+      end
+      % </AlgoCode>
+    else
+      atest = false;
+    end
+
+    % Return a result structure
+    result = utp_prepare_result(atest, stest, dbstack, mfilename);
+  end % END UTP_03
+
+  %% UTP_04
+
+  % <TestDescription>
+  %
+  % Tests that the fixfs method works with a list of AOs as input.
+  %
+  % </TestDescription>
+  function result = utp_04
+
+    % <SyntaxDescription>
+    %
+    % Test that the fixfs method works for a list of AOs as input.
+    %
+    % </SyntaxDescription>
+
+    try
+      % <SyntaxCode>
+      out = fixfs(at1,at5,at6);
+      % </SyntaxCode>
+      stest = true;
+    catch err
+      disp(err.message)
+      stest = false;
+    end
+
+    % <AlgoDescription>
+    %
+    % 1) Check that the number of elements in 'out' is the same as
+    %    the number in the input.
+    % 2) Check that each output AO contains the correct data.
+    %
+    % </AlgoDescription>
+
+    atest = true;
+    aoin  = [at1, at5, at6];
+    if stest
+      % <AlgoCode>
+      % Check we have the correct number of outputs
+      if numel(out) ~= 3, atest = false; end
+      % Check the output data
+      for kk = 1:numel(aoin)
+        fs = aoin(kk).fs;
+        t0 = 0;
+        Nsecs = aoin(kk).data.nsecs;
+        t = t0 + [0:1/fs:Nsecs-1/fs].';
+        y = interp1(aoin(kk).x,aoin(kk).y, t, 'spline', 'extrap');
+        if ~isequal(y, out(kk).y), atest = false; end
+        if ~isequal(t, out(kk).x), atest = false; end
+      end
+      % </AlgoCode>
+    else
+      atest = false;
+    end
+
+    % Return a result structure
+    result = utp_prepare_result(atest, stest, dbstack, mfilename);
+  end % END UTP_04
+
+  %% UTP_05
+
+  % <TestDescription>
+  %
+  % Tests that the fixfs method works with a mix of different shaped AOs as
+  % input.
+  %
+  % </TestDescription>
+  function result = utp_05
+
+    % <SyntaxDescription>
+    %
+    % Test that the fixfs method works with an input of matrices and vectors
+    % and single AOs. Additionally define a 'fs' in a plist.
+    %
+    % </SyntaxDescription>
+
+    try
+      % <SyntaxCode>
+      fs = 7;
+      pl = plist('fs', fs);
+      out = fixfs(at1,[at5 at6],at5,[at5 at1; at6 at1],at6, pl);
+      % </SyntaxCode>
+      stest = true;
+    catch err
+      disp(err.message)
+      stest = false;
+    end
+
+    % <AlgoDescription>
+    %
+    % 1) Check that the number of elements in 'out' is the same as in
+    %    input.
+    % 2) Check that each output AO contains the correct data.
+    % 3) Check that 't0' and 'fs' are correct.
+    %
+    % </AlgoDescription>
+
+    TOL   = 1e-14;
+    atest = true;
+    aoin  = [at1, reshape([at5 at6], 1, []), at5, reshape([at5 at1; at6 at1], 1, []), at6];
+    if stest
+      % <AlgoCode>
+      % Check we have the correct number of outputs
+      if numel(out) ~= 9, atest = false; end
+      % Check the output data
+      for kk = 1:numel(aoin)
+        Nsecs = aoin(kk).data.nsecs;
+        % We have to think about what we want to do with t0
+        t0 = aoin(kk).data.t0.double;
+        % This is numerically more accurate
+        t = [0:1/fs:Nsecs-1/fs].';
+        y = interp1(aoin(kk).x, aoin(kk).y, t, 'spline', 'extrap');
+        if ~isequal(y, out(kk).y), atest = false; end
+        if any(abs(t-out(kk).x)>TOL), atest = false; end
+        % Check 't0' and 'fs'
+        if ~isequal(out(kk).fs, fs), atest = false; end
+        if ~isequal(out(kk).t0.utc_epoch_milli, t0*1000), atest = false; end
+      end
+      % </AlgoCode>
+    else
+      atest = false;
+    end
+
+    % Return a result structure
+    result = utp_prepare_result(atest, stest, dbstack, mfilename);
+  end % END UTP_05
+
+  %% UTP_06
+
+  % <TestDescription>
+  %
+  % Tests that the fixfs method properly applies history.
+  %
+  % </TestDescription>
+  function result = utp_06
+
+    % <SyntaxDescription>
+    %
+    % Test that the result of applying the fixfs method can be processed back
+    % to an m-file. Additionally define a 'fs' in a plist.
+    %
+    % </SyntaxDescription>
+
+    try
+      % <SyntaxCode>
+      fs = 7;
+      pl = plist('fs', fs);
+      out  = fixfs(at5, pl);
+      mout = rebuild(out);
+      % </SyntaxCode>
+      stest = true;
+    catch err
+      disp(err.message)
+      stest = false;
+    end
+
+    % <AlgoDescription>
+    %
+    % 1) Check that the last entry in the history of 'out' corresponds to
+    %    'fixfs'.
+    % 2) % Check that the re-built object is the same object as 'out'.
+    %
+    % </AlgoDescription>
+
+    TOL   = 1e-14;
+    atest = true;
+    if stest
+      % <AlgoCode>
+      % Check the last step in the history of 'out'
+      if ~strcmp(out.hist.methodInfo.mname, 'fixfs'), atest = false; end
+      % Check the output data
+      Nsecs = at5.data.nsecs;
+      % We have to think about what we want to do with t0
+      t0 = at5.data.t0.double;
+      % This is numerically more accurate
+      t = [0:1/fs:Nsecs-1/fs].';
+      y = interp1(at5.x, at5.y, t, 'spline', 'extrap');
+      if ~isequal(y, out.y), atest = false; end
+      if any(abs(t-out.x)>TOL), atest = false; end
+      % Check 't0' and 'fs'
+      if ~isequal(out.fs, fs), atest = false; end
+      if ~isequal(out.t0.utc_epoch_milli, t0*1000), atest = false; end
+      % % Check the re-built object
+      if ~eq(mout, out, ple2), atest = false; end
+      % </AlgoCode>
+    else
+      atest = false;
+    end
+
+    % Return a result structure
+    result = utp_prepare_result(atest, stest, dbstack, mfilename);
+  end % END UTP_06
+
+  %% UTP_07
+
+  % <TestDescription>
+  %
+  % Tests that the fixfs method can modify the input AO.
+  %
+  % </TestDescription>
+  function result = utp_07
+
+    % <SyntaxDescription>
+    %
+    % Test that the fixfs method can modify the input AO by calling
+    % with no output.
+    %
+    % </SyntaxDescription>
+
+    try
+      % <SyntaxCode>
+      fs   = 27;
+      pl   = plist('fs', fs);
+      % copy at1 to work with
+      ain   = ao(at1);
+      % modify ain
+      aout   = ain.fixfs(pl);
+      ain.fixfs(pl);
+      % </SyntaxCode>
+      stest = true;
+    catch err
+      disp(err.message)
+      stest = false;
+    end
+
+    % <AlgoDescription>
+    %
+    % 1) Check that 'at1' and 'ain' are now different.
+    % 2) Check that 'ain' is fixfs(at1).
+    %
+    % </AlgoDescription>
+
+    TOL   = 1e-14;
+    atest = true;
+    if stest
+      % <AlgoCode>
+      % Check that fixfs modified the input by comparing to the copy
+      if eq(ao(at1), ain, ple1), atest = false; end
+      % Check that fixfs doesn't modified the input for the function notation
+      if ~eq(aout, ain, ple1), atest = false; end
+      % Check the output data
+      Nsecs = at1.data.nsecs;
+      % We have to think about what we want to do with t0
+      t0 = at1.data.t0.double;
+      % This is numerically more accurate
+      t = [0:1/fs:Nsecs-1/fs].';
+      y = interp1(at1.x, at1.y, t, 'spline', 'extrap');
+      if ~isequal(y, ain.y), atest = false; end
+      if any(abs(t-ain.x)>TOL), atest = false; end
+      % Check 't0' and 'fs'
+      if ~isequal(ain.fs, fs), atest = false; end
+      if ~isequal(ain.t0.utc_epoch_milli, t0*1000), atest = false; end
+      % </AlgoCode>
+    else
+      atest = false;
+    end
+
+    % Return a result structure
+    result = utp_prepare_result(atest, stest, dbstack, mfilename);
+  end % END UTP_07
+
+  %% UTP_08
+
+  % <TestDescription>
+  %
+  % Tests that the fixfs method keeps the data shape of the input object.
+  %
+  % </TestDescription>
+  function result = utp_08
+
+    % <SyntaxDescription>
+    %
+    % Test that the fixfs method keeps the data shape of the input object. The
+    % input AO must be an AO with row data and an AO with column data.
+    %
+    % </SyntaxDescription>
+
+    try
+      % <SyntaxCode>
+      fs   = 27;
+      pl   = plist('fs', fs);
+      out1 = fixfs(at5, pl);
+      out2 = fixfs(at6, pl);
+      % </SyntaxCode>
+      stest = true;
+    catch err
+      disp(err.message)
+      stest = false;
+    end
+
+    % <AlgoDescription>
+    %
+    % 1) Check that the shpe of the data doesn't change.
+    %
+    % </AlgoDescription>
+
+    atest = true;
+    if stest
+      % <AlgoCode>
+      % Check the shape of the output data
+      if size(out1.data.y,2) ~= 1, atest = false; end
+      if size(out2.data.y,1) ~= 1, atest = false; end
+      % </AlgoCode>
+    else
+      atest = false;
+    end
+
+    % Return a result structure
+    result = utp_prepare_result(atest, stest, dbstack, mfilename);
+  end % END UTP_08
+
+  %% UTP_09
+
+  % <TestDescription>
+  %
+  % Check that the fixfs method pass back the output objects to a list of
+  % output variables or to a single variable.
+  %
+  % </TestDescription>
+  function result = utp_09
+
+    % <SyntaxDescription>
+    %
+    % Call the method with a list of output variables and with a single output
+    % variable. Additionaly check that the rebuild method works on the output.
+    %
+    % </SyntaxDescription>
+
+    try
+      % <SyntaxCode>
+      fs   = 27;
+      pl   = plist('fs', fs);
+      [o1, o2] = fixfs(at5, at6, pl);
+      o3  = fixfs(at5, at6, pl);
+      mout1 = rebuild(o1);
+      mout2 = rebuild(o2);
+      mout3 = rebuild(o3);
+      % </SyntaxCode>
+      stest = true;
+    catch err
+      disp(err.message)
+      stest = false;
+    end
+
+    % <AlgoDescription>
+    %
+    % 1) Check that the output contains the right number of objects
+    % 2) Check that the 'rebuild' method produces the same object as 'out'.
+    %
+    % </AlgoDescription>
+
+    atest = true;
+    if stest
+      % <AlgoCode>
+      % Check the number of outputs
+      if numel(o1) ~=1, atest = false; end
+      if numel(o2) ~=1, atest = false; end
+      if numel(o3) ~=2, atest = false; end
+      % Check the rebuilding of the object
+      if ~eq(o1, mout1, ple2), atest = false; end
+      if ~eq(o2, mout2, ple2), atest = false; end
+      if ~eq(o3, mout3, ple2), atest = false; end
+      % </AlgoCode>
+    else
+      atest = false;
+    end
+
+    % Return a result structure
+    result = utp_prepare_result(atest, stest, dbstack, mfilename);
+  end % END UTP_09
+
+  %% UTP_10
+
+  % <TestDescription>
+  %
+  % Tests that the fixfs method works with a list of AOs as input and different
+  % 't0' and 'fs' for the inputs.
+  %
+  % </TestDescription>
+  function result = utp_10
+
+    % <SyntaxDescription>
+    %
+    % Test that the fixfs method works for a list of AOs as input and different
+    % 't0' and 'fs'
+    %
+    % </SyntaxDescription>
+
+    try
+      % <SyntaxCode>
+      fs_in = [ 3 7 9 ];
+      pl    = plist('fs', fs_in);
+      out   = fixfs(at1,at5,at6, pl);
+      % </SyntaxCode>
+      stest = true;
+    catch err
+      disp(err.message)
+      stest = false;
+    end
+
+    % <AlgoDescription>
+    %
+    % 1) Check that the number of elements in 'out' is the same as
+    %    the number in the input.
+    % 2) Check that each output AO contains the correct data.
+    % 3) Check that each output contains the correct frequency and start time.
+    %
+    % </AlgoDescription>
+
+    TOL   = 1e-14;
+    atest = true;
+    aoin  = [at1, at5, at6];
+    if stest
+      % <AlgoCode>
+      % Check we have the correct number of outputs
+      if numel(out) ~= 3, atest = false; end
+      % Check the output data
+      for kk = 1:numel(aoin)
+        fs = fs_in(kk);
+        t0 = aoin(kk).data.t0.double;
+        Nsecs = aoin(kk).data.nsecs;
+        t = [0:1/fs:Nsecs-1/fs].';
+        y = interp1(aoin(kk).x,aoin(kk).y, t, 'spline', 'extrap');
+        if ~isequal(y, out(kk).y), atest = false; end
+        if any(abs(t-out(kk).x)>TOL), atest = false; end
+        % Check 't0' and 'fs'
+        if abs(out(kk).fs - fs)>TOL, atest = false; end
+        if ~isequal(out(kk).t0.utc_epoch_milli, t0*1000), atest = false; end
+      end
+      % </AlgoCode>
+    else
+      atest = false;
+    end
+
+    % Return a result structure
+    result = utp_prepare_result(atest, stest, dbstack, mfilename);
+  end % END UTP_10
+
+
+  %% UTP_12
+
+  % <TestDescription>
+  %
+  % Tests that the fixfs method works with the method 'samples'.
+  %
+  % </TestDescription>
+  function result = utp_12
+
+    % <SyntaxDescription>
+    %
+    % Test that the fixfs method works for the method 'samples'.
+    %
+    % </SyntaxDescription>
+
+    try
+      % <SyntaxCode>
+      pl  = plist('method', 'Samples');
+      out = fixfs(at1, pl);
+      % </SyntaxCode>
+      stest = true;
+    catch err
+      disp(err.message)
+      stest = false;
+    end
+
+    % <AlgoDescription>
+    %
+    % 1) Check that each output AO contains the correct data.
+    % 2) Check that each output contains the correct frequency and start time.
+    %
+    % </AlgoDescription>
+
+    TOL   = 1e-14;
+    atest = true;
+    if stest
+      % <AlgoCode>
+      % Check the output data
+      N = length(at1.y);
+      t = linspace(0, (N-1)/at1.fs, N).';
+      y  = interp1(at1.x,at1.y, t, 'spline', 'extrap');
+      if ~isequal(y, out.y), atest = false; end
+      if any(abs(t-out.x)>TOL), atest = false; end
+      % Check 'fs'
+      if ~isequal(out.fs, 1/(t(2)-t(1))), atest = false; end
+      % </AlgoCode>
+    else
+      atest = false;
+    end
+
+    % Return a result structure
+    result = utp_prepare_result(atest, stest, dbstack, mfilename);
+  end % END UTP_12
+
+  %% UTP_13
+
+  % <TestDescription>
+  %
+  % Tests that the fixfs method works with antialising filter.
+  %
+  % </TestDescription>
+  function result = utp_13
+
+    % <SyntaxDescription>
+    %
+    % Test that the fixfs method works for the antialising filters iir and fir.
+    %
+    % </SyntaxDescription>
+
+    try
+      % <SyntaxCode>
+      pl_iir  = plist('filter', 'iir');
+      pl_fir  = plist('filter', 'fir');
+      out_iir = fixfs(at1, pl_iir);
+      out_fir = fixfs(at1, pl_fir);
+      % </SyntaxCode>
+      stest = true;
+    catch err
+      disp(err.message)
+      stest = false;
+    end
+
+    % <AlgoDescription>
+    %
+    % 1) Check that each output AO contains the correct data.
+    % 2) Check that each output contains the correct frequency and start time.
+    %
+    % </AlgoDescription>
+
+    TOL   = 1e-14;
+    atest = true;
+    if stest
+      % <AlgoCode>
+      % Check the output data
+      Nsecs = at1.data.nsecs;
+      t  = [0:1/at1.fs:Nsecs-1/at1.fs].';
+      % Compute antialiasing filter (iir filter)
+      pl = plist('type', 'lowpass', 'order', 8, 'fs', at1.fs,'fc', 0.9*(at1.fs/2));
+      f = miir(pl);
+      at1_iir = filtfilt(at1, f);
+      y_iir = interp1(at1_iir.x, at1_iir.y, t, 'spline', 'extrap');
+      % Compute antialiasing filter (fir filter)
+      pl = plist('type', 'lowpass', 'order', 64, 'fs', at1.fs, 'fc', 0.9*(at1.fs/2));
+      f = mfir(pl);
+      at1_fir = filter(at1, f);
+      y_fir = interp1(at1_fir.x, at1_fir.y, t, 'spline', 'extrap');
+
+      % Check with iir filter
+      if ~isequal(y_iir, out_iir.y), atest = false; end
+      if any(abs(t-out_iir.x)>TOL), atest = false; end
+      if ~isequal(out_iir.fs, 1/(t(2)-t(1))), atest = false; end
+      % Check with fir filter
+      if ~isequal(y_fir, out_fir.y), atest = false; end
+      if any(abs(t-out_fir.x)>TOL), atest = false; end
+      if ~isequal(out_fir.fs, 1/(t(2)-t(1))), atest = false; end
+      % </AlgoCode>
+    else
+      atest = false;
+    end
+
+    % Return a result structure
+    result = utp_prepare_result(atest, stest, dbstack, mfilename);
+  end % END UTP_13
+
+  %% UTP_14
+
+  % <TestDescription>
+  %
+  % Tests that the fixfs method works with an AO with non evenly sampled data.
+  %
+  % </TestDescription>
+  function result = utp_14
+
+    % <SyntaxDescription>
+    %
+    % Test that the fixfs method works for an AO with non evenly samples data.
+    %
+    % </SyntaxDescription>
+    msg = '';
+    try
+      % <SyntaxCode>
+      xvals = sort(randn(30,1));
+      yvals = randn(30,1);
+      pl_ao = plist('xvals', xvals, 'yvals', yvals, 'type', 'tsdata');
+      aa    = ao(pl_ao);
+
+      fs  = 13;
+      t0  = 7;
+      pl  = plist('t0', t0, 'fs', fs);
+      out = fixfs(aa, pl);
+      % </SyntaxCode>
+      stest = true;
+    catch err
+      disp(err.message)
+      msg = err.message;
+      stest = false;
+    end
+
+    % <AlgoDescription>
+    %
+    % 1) Check that each output AO contains the correct data.
+    % 2) Check that each output contains the correct frequency and start time.
+    %
+    % </AlgoDescription>
+
+    TOL   = 1e-14;
+    atest = true;
+    if stest
+      % <AlgoCode>
+      % Check the output data
+      Nsecs = aa.data.nsecs;
+      t0 =  aa.data.getX(1);
+      t  =  t0 + [0:1/fs:Nsecs-1/fs].';
+      y  = interp1(aa.x,aa.y, t, 'spline', 'extrap');
+      if ~isequal(y, out.y), msg = 'y values are not equal'; atest = false; end
+      if any(abs(t-out.x)>TOL), msg = 'x values are not evenly spaced'; atest = false; end
+      % Check 't0' and 'fs'
+      if abs(out.fs - fs)>TOL, msg = 'the sample rates are not correct'; atest = false; end
+      if ~eq(out.t0, aa.t0), msg = 'the t0 is not correct'; atest = false; end
+      % </AlgoCode>
+    else
+      atest = false;
+    end
+
+    % Return a result structure
+    result = utp_prepare_result(atest, stest, dbstack, mfilename, msg);
+  end % END UTP_14
+  
+  
+end