问题
I would like to have some file, myfunc.m, in my MATLAB path and somehow load its contents into a MATLAB function block automatically just before the simulation starts. This way, I can use an external editor to write these embedded function, version control them separately as independent files, etc.
Is there a way to achieve this programmatically?
My initial attempt was to try and access the contents of the function block using something like get_param, but I can't seem to gain read/write access to the code itself.
回答1:
If the target MATLAB Function block doesn't already exist then you can add it as follows (see this SO post):
load_system('eml_lib');
libname = sprintf('eml_lib/MATLAB Function');
add_block(libname,'myModel/myBlockName');
You can then modify the block's code using the Stateflow API:
sf = sfroot();
block = sf.find('Path','myModel/myBlockName','-isa','Stateflow.EMChart');
block.Script = 'Your code goes here';
See also this post on MATLAB Answers.
回答2:
First, you will need to add the folder containing the m-file to the default path. To do this:
(In the Command window) Go to File -> Set Path -> Add Folder (choose the folder containing the m-file)
Now, you should use the InitFcn callback in the model properties to call your function. To do this, open the model:
(In the Model window) Go to File -> Model Properties -> Callbacks -> InitFcn In the edit box provided for the InitFcn, write the command to call your function i.e. myfunc(); You will have to modify this command as per your function and requirements.
Once done, apply the changes to the Model Properties window and simulate the model.
回答3:
I am thinking that model callbacks may be a way to do what you want, though I have not used this technique myself.
来源：https://stackoverflow.com/questions/10335564/load-code-for-a-matlab-function-block-at-simulink-runtime