How do I set the signal logging parameters for a line in my Simulink model from the MATLAB command line?

I would like to access all of the Signal Properties dialog box parameters from the command line. Starting from the line handle I was able to access some of them such as Test Point, Signal Name etc. However, I cannot find the properties for the following parameters:

1. "Log Signal Data"

2. "Limit Max Data Points To"

3. "Decimation"

The rest of the parameters can be accessed as follows:

% if lineHandle is the handle to a signal (connecting line) in a model then

set_param(lineHandle, 'testPoint', true);

set_param(lineHandle, 'Name', 'x1');

I would like to know how the above listed parameters ("Log Signal Data", "Limit Max Data Points To" and "Decimation") can be set from the command line.

Answer 1

[MathWorks Support Team]

The ability to set these signal logging parameters for a line from the MATLAB command line starting from the line handle is not available in Simulink 6.4 (R2006a) or any previous release.

However, these properties can be set from the command line by starting from the block handle instead of the line handle. Thus, if it is required to set the signal logging properties for a particular line, then one can start from the block whose outport is connected to that line and obtain the 'PortHandles' property from this block handle.

h = get_param(gcbh, 'porthandles');

op = h.Outport;

set_param(op, 'DataLogging', 'on')

set_param(op, 'DataLoggingDecimateData', 'on')

set_param(op, 'DataLoggingDecimation', '2')

set_param(op, 'DataLoggingLimitDataPoints', 'on')

set_param(op, 'DataLoggingMaxPoints', '5000')

The ability to access these properties starting from the line handle is being considered for incorporation into a future release of Simulink.