In my Simulink model are some embedded MATLAB functions. Is there a way to get the content (the text you see in the editor) of this blocks?
My first guess was to use find_system to get the embedded MATLAB functions and then get_param to get the content. But I dont find the needed parameter name. The documentation didnt show up any parameter for the embedded MATLAB functions.
Try this technical solution on the Mathworks website.
Related
I have a Simulink model "mod" with a Subsystem "link" in it, which is actually an active (i.e. "resolved") library link. Inside this linked Subsystem there is a Stateflow Chart "chart".
In Simulink I can search for the Stateflow Chart like this:
find_system('mod', 'FollowLinks', 'on', 'Name', 'chart')
But when I have the model as object "modObj", I can also use its "find" method:
modObj.find('Name', 'chart')
Unfortunately the "find" method does not follow resolved library links by default. Also the documentation does not describe a parameter like "FollowLinks" for "find_system". I already tried using "FollowLinks" and "-followlinks" but without success. Also searches on the net gave no result.
Is there an undocumented parameter for this functionality?
I know that I can use the "find_system" function for the above example. But in fact I am searching for Stateflow objects inside models, which are only found by the "find" method.
It seems that it is not possible to navigate through linked Stateflow objects. I have now worked around this by implementing a method which detects linked Stateflow charts (by using the "ReferenceBlock" property of the Simulink handle), ensuring the linked library is loaded and returing the library's object. Then I am able to work on the library instead of the current model (although it might be locked, but searching and property extraction is always possible).
In my Simulink model are some embedded MATLAB functions. Is there a way to get the content (the text you see in the editor) of this blocks?
My first guess was to use find_system to get the embedded MATLAB functions and then get_param to get the content. But I dont find the needed parameter name. The documentation didnt show up any parameter for the embedded MATLAB functions.
Try this technical solution on the Mathworks website.
I have been reading someone else's matlab code and I don't know how the code structured. I mean I would like to know the hierarchy of functions, which function uses which function. I am reading the code to figure that out but its taking a lot of time.
So is there any other way I can see this hierarchy without reading the whole thing? To be honest it is starting to get confusing. Maybe MatLab has a built in function for that! I found this:
How can I generate a list of function dependencies in MATLAB?
but this doesn't seem to be helpful!
The MATLAB profiler will show you what functions are called by your code (and much more information to boot) and allow you to click through the hierarchy of function calls. You can either call profile on and then run your code, then call profile off and profile viewer, or you can simply call profile viewer and type a single line of code to run in the edit box at the top.
Use the dependency report provided in MATLAB:
http://www.mathworks.co.uk/help/matlab/matlab_prog/identify-dependencies.html
There are also some tools on the File Exchange, such as fdep.
No idea about a function to show visible or depended-upon functions. However the basic rules are:
1) Only the first function in a .m file (normally has to have the same name as the file itself) is visible outside that file.
2) Any function can see any top level (see 1.) function if the file is in the matlab path. Matlab can show you the path so you know where it's hunting.
3) The order of the path is important, the first instance of a function called foo found in the path will be called. Obviously the current directory is at the top of the path.
3) All functions in a given file can see all other functions in that file.
That's the basics. No doubt there are other rules, and possibly exceptions to this. But that understanding generally serves me well.
Obviously the easiest way to work out which function is being called is to click on it in the editor and open it.
One thing I do is simply place in each function at the beginning fprintf("inside function <name>/n"); and at the end of the function fprintf("leaving function <name>/n"); where <name> is the name of the function.
This will give you a very specific list of which function is being called by which function (based on the order that they appear). Another thing like this would be to place fprintf("function <name1> calling function <name2>/n"); so you can be more explicit about which function is being called by which one.
To keep it short, I'm developing a software tool where I would like to import
parameters into GUI from .m-files, but I can't find how to import the parameters.
I'm using iugetfile to 'reach it' but how do I insert the parameter values?
If I open the file in MATLAB (command window), then I get the parameters in
the workspace. Is there an easy way to read the parameters into GUI to be able
to use them in functions there?
The way to write data into gui is using set. For example: set(handles.,'String','content'). You can see examples of writing and reading values from here: (mathworks link)
I would use .mat instead .m if you need to read parameter values.
i want to change function variable at each step in a for loop in matlab.
i take these steps:
i created my mfile function
function [jfun,fun]=air(x,vt,ty,tz,p2,y0)
jfun=[(cos(tz)*cos(ty)*vt/9.81)*(1-exp(-9.81*x(2)/vt)),...
x(1)*cos(tz)*cos(ty)*exp(-9.81*x(1)/vt);
(-vt*sin(tz)*cos(ty)/9.81)*exp(-9.81*x(1)/vt),...
(x(1)*sin(tz)*cos(ty)*+vt)*exp(-9.81*x(1)/vt)];
fun=[(x(1)*cos(ty)*cos(tz)*vt/9.81)*(1-exp(-9.81*x(2)/vt))-p2;...
(vt/9.81)*(x(1)*sin(tz)*cos(ty)+vt)*(1-exp(-9.81*x(2)/vt))-vt*x(2)+y0];
end
and then i used newtonSys command:
ty=rad(-23)
tz=rad(15)
p2=1.8
vt=8.4925
y0=0.2
myfun=#(x)air(x,vt,ty,tz,p2,y0)
x=newtonSys(myfun,[15 5],0.000001,0.000001,500,1)
and matlab answer:
Error in ==> Untitled18 at 7
x=newtonSys(myfun,[15 5],0.000001,0.000001,500,1)
i guess that its because of wrong use of function handle and for my function i have to use another command or i have to use another method for solving 2nonlinear equation.
First, you haven't displayed the entire error. MATLAB should tell you what the actual error is, so unless you tell us that, we won't know what's wrong.
Secondly I don't see newtonSys in my system, or in the online MATLAB documentation. So most likely it is an external program, which most people here might not be familiar with. The closest I found from a quick Google search was this, which is an implementation of Newton's method for approximating the root of a non-linear system of n-equations. Are you using the same file? If so, if you look at the comments, it says that you need to pass the function as a string. So you'd have to pass myfun as 'myfun'.
If not, could you edit your question and add the contents of the function that you're using? Without these, it's near impossible to answer your question.