Hi Mark,
The variables in the model workspace can be accessed and modified using the "Simulink.ModelWorkspace" object of the model in MATLAB. Here is an example MATLAB code to do the same:
% Load the model into memory if it is not already loaded
load_system('FCElectricPlant');
% Get the variable from the model workspace
hws = get_param('FCElectricPlant', 'ModelWorkspace');
efficiency_table = hws.getVariable('efficiency_table');
% Now you can modify the efficiency_table as needed
% For example, to change the value at row 5, column 6:
efficiency_table(5, 6) = newValue;
% After modifying the efficiency_table, write it back to the model workspace
hws.assignin('efficiency_table', efficiency_table);
% Save changes to the model if necessary
save_system('FCElectricPlant');
For more information on how to interact with the model workspace using a "Simulink.ModelWorkspace" object: https://www.mathworks.com/help/releases/R2023b/simulink/slref/simulink.modelworkspace.html
