Real-Time Windows Target

Plotting Logged Signal Data

You can use the MATLAB plotting functions for visualizing nonreal-time simulated data or real-time application data.

After running your real-time application and logging data to the MATLAB workspace, you can plot the data. This procedure uses the Simulink model rtwin_model.mdl as an example, and assumes you saved your data to the variable ScopeData:

1. In the MATLAB command window, type

• ScopeData
  

1. MATLAB lists the structure of the variable ScopeData. The variable ScopeData is a MATLAB structure containing the fields time vector, signal structure, and a string containing the block name.

   • ScopeData = 
                 time: [10000x1 double]
           signals: [1x1 struct]
         blockName: 'rtwin_model/Scope'
     

   To list the contents of the structure signals, type

   • ScopeData.signals
     

   MATLAB lists the structure of the variable ScopeData.signals. This structure contains one or more vectors of signal data depending on the number of signal inputs to the Scope block.

   • ans = 
            values: [10000x1 double]
             label: ''
             title: ''
         plotStyle: 1
     

2. To plot the first 1000 points, type

• plot(ScopeData.time(1:1000), 
  ScopeData.signals.values(1:1000))
  

1. MATLAB plots the first 1000 samples from 0.0000 to 0.9990 seconds.
   
   

3. The variable ScopeData is not automatically saved to your hard disk. To save the variable ScopeData, type

• save ScopeData
  

1. MATLAB saves the scope data to the file ScopeData.mat.

Entering Signal and Triggering Properties

Signal Logging to a Disk Drive