DataSet Construction

Getting Started

In general, data is stored in a dataset object.

From a GUI

Using PLS_Toolbox and Solo, it is easy to import data into a dataset object using the data importer. From the workspace browser select File/Import Data to launch the GUI.

From the MATLAB Command Line

From the command line, the easiest way to create a dataset is to pass an array to the dataset function. First we will create an array of data to be passed to the dataset function.

>> t    = [0:0.1:10]';
>> x    = [cos(t) sin(t) exp(-t)];
>> data = dataset(x)
 
data = 
       name: x
       type: data 
       date: 23-May-2016 11:24:53
    moddate: 23-May-2016 11:24:53
       data: 101x3 [double]
      label: {2x1} [array (char)]
               Mode 1  [: ] 
               Mode 2  [: ] 
  axisscale: {2x1} [vector (real)] (axistype)
               Mode 1  [: ] (none) 
               Mode 2  [: ] (none) 
      title: {2x1} [vector (char)]
               Mode 1  [: ] 
               Mode 2  [: ] 
      class: {2x1} [vector (double)]
               Mode 1  [: ] 
               Mode 2  [: ] 
    classid: {2x1} [cell of strings]
    include: {2x1} [vector (integer)]
               Mode 1  [: 1x101] 
               Mode 2  [: 1x3]   
    history: {1x1 cell} [array (char)]
      OTHER: [View Class Summary]

Alternatively we could start with an empty dataset and assign the the array x to its data field.

newdata = dataset;
newdata.data = x;

Similarly we may set the other fields of the dataset object individually.

vars = {'cos(t)';'sin(t)';'exp(-t)'};
newdata.author   = 'Data Manager';        %sets the author field
newdata.label{2} = vars;                  %sets the labels for columns = dimension 2
newdata.labelname{2} = 'Variables';       %sets the name of the label for columns
newdata.axisscale{1} = t;                 %sets the axis scale for rows = dimension 1
newdata.axisscalename{1} = 'Time';        %sets the name of the axis scale for rows
newdata.title{1}         = 'Time (s)';    %sets the title for rows
newdata.titlename{1}     = 'Time Axis';   %sets the titlename for rows
newdata.title{2} = 'f(t)';                %sets the title for columns
newdata.titlename{2} = 'Functions';       %sets the titlename for columns