How can I disable data logging for all the signals in my model?

I have enabled data logging for a lot of signals in my model, how can do this via command line functions?

Answer 1

[MathWorks Support Team]

The following code will disable signal logging for all the signals in the model ('gcs' can be replaced by the model name):

mdlsignals = find_system(gcs,'FindAll','on','LookUnderMasks','all','FollowLinks','on','type','line','SegmentType','trunk');
ph = get_param(mdlsignals,'SrcPortHandle')
for i=1: length(ph)
    set_param(ph{i},'datalogging','off')
end

[Asvin Kumar]

For those who want to copy paste this into a laaarge model...

...add a semicolon on line 2. 

My ph variable had an output of length 2077x1. :/

[Simon Silge]

Just to add another pointer: you can override your logging settings using the Signal Logging Selector and deactivate all logging for a model there. The advantage is that you can afterwards switch back to your original setup with all signals logging as specified before.

To open go to: Simulink Toolstrip: On the Modeling tab, click Model Settings > Data Import/Export. Then, click Configure Signals to Log.

On the top you can choose between different logging modes. Choose "Override signals". Next select all the signals on the list on the right (Ctrl+A to select all).

For model references you can also specify here how they should behave. When you want to go back to your original setting you can change from "override signals" to "Log all signals as specified in model".

If you have subsystems and model references the workflow via UI is still cumbersome as you need to go through them one by one. But you can also use this tool programmatically:

https://de.mathworks.com/help/simulink/ug/overriding-signal-logging-settings.html#bs40nea

Answer 2

[Keqin Xu]

I made a convenient shortcut out of the following script.

% this will remove logging of any selected signals in the SimuLinkmodel

mn=inputdlg({'Input SimuLink Model Name:'},'',1,{''});

if ~isempty(mn)

if exist(mn{1})==4

mdlsignals = find_system(mn,'FindAll','on','LookUnderMasks','all','FollowLinks','on','type','line','SegmentType','trunk');

ph = get_param(mdlsignals,'SrcPortHandle');

for i=1: length(ph)

set_param(ph{i},'datalogging','off')

end

msgbox(['Any signal loggings in "',mn{1},'" have been removed.'])

else

msgbox(['"',mn{1},'" is not a valid SimuLink model.'])

end

end