"TS.Global" I got this as a part of a matlab code. Can anyone help to understand what does mean? I have seen this dot operator as a part of structure; is this mean the same?

If any documentation regarding this; kindly share.....

[Walter Roberson]

What shows up for

class(TS)

[BIPIN SAMUEL]

@Walter Roberson Actually it is from a matlab function code. My doubt is why we use that dot operator; I have seen dot operator with structure data. Can we use anywhere else other that numerical calculation?

Answer 1

[Walter Roberson]

The dot operator such as TS.Global can mean:

• That TS is a struct(), and Global is a field in the struct
• That TS is an object, and Global is a property of the object. It is not necessarily an object created in MATLAB: it might be an object created in Java for example
• That TS is an object, and Global is a method associated with the object. It is not necessarily an object created in MATLAB; it might be an object created in Java for example
• That TS is a package created with a +TS directory and Global is a function defined in the package; https://www.mathworks.com/help/matlab/matlab_oop/scoping-classes-with-packages.html

TS.Global appears to be used in the Model Based Calibration toolbox. When I chase back the source of TS from old mbcmodels/@xregoptmgr source code that I find online, then it appears that the variable TS is a "model", probably of class mbcmodels or a subclass of that.

Possibly these days the Global property corresponds to https://www.mathworks.com/help/mbc/mbccommandline/global.html

[BIPIN SAMUEL]

@Walter Roberson @Image Analyst class(TS) shows 'char'. It is from function 'mle'.

Models= TS.Global;
Nf= length(Models);

st=1;
for i=1:Nf
    m= Models{i};
    b= double(m);
    Tin= Terms(m);
    b(Tin) = Bmle(st:st+sum(Tin)-1);
    Models{i} = update(m,b);
    st= st+sum(Tin);
end

if (DatumType(TS.Local)==1 | DatumType(TS.Local)==2) & ~RFstart(TS.Local);
    TS.datum= Models{1};
end
TS.Global= Models;

[Image Analyst]

Then TS is not what you think it is. It's a simple string variable (actually a character array) which means it has no such property or method. Here is a simple example to illustrate:

TS = 'abcdefg';
class(TS)

ans = 'char'

TS.Global

Dot indexing is not supported for variables of this type.

Why would anyone think that this TS had a Global property or method? Show how you created TS by "mle".

[Bruno Luong]

Nop, instead of typing

class(TS)

OP types

class TS

which returns char

[Walter Roberson]

What shows up for

which -all mle

The version of mle that I find in the Statistics Toolbox does not contain that code or any reference to TS.Global

[BIPIN SAMUEL]

@Walter Roberson I used this command for finding the code

type mle

[Walter Roberson]

Execute the command

which -all mle

and tell us the output

Also, which MATLAB version are you using?

[Image Analyst]

Do what Walter says. For me, I see

>> which -all mle

C:\Program Files\MATLAB\R2022a\toolbox\stats\stats\mle.m

[BIPIN SAMUEL]

@Walter Roberson While executing I got this:

\Program Files\MATLAB\R2021a\toolbox\stats\stats\mle.m

\Program Files\MATLAB\R2021a\toolbox\mbc\mbcmodels\@xregtwostage\mle.m % xregtwostage method

\Program Files\MATLAB\R2021a\toolbox\mbc\mbctools\@mdev_local\mle.m % mdev_local method

and version I am using is R2021a

[Image Analyst]

OK I think that looks fine. Now how did you create TS? Where is the line of code that says

TS = ................whatever it is......................

Maybe you can just attach the m-file with a paperclip icon if it's too complicated.

[Walter Roberson]

put a breakpoint at the line

Models= TS.Global;

in the mle function that is being invoked. Then run the code. When it stops at the line

class(TS)

and show us the result, and also show us the output

dbstack

[BIPIN SAMUEL]

Thank you @Walter Roberson @Image Analyst for your answers and the support. It would definitely benefit me.

"\Program Files\MATLAB\R2021a\toolbox\stats\stats\mle.m"

This was the file that I was needed.

[Walter Roberson]

Is the question resolved?

[BIPIN SAMUEL]

@Walter Roberson Yes, Thank You very much....

[Image Analyst]

But you should have already had that file if you had the stats toolbox installed.

1. Did you not have the stats toolbox installed and had to buy it?
2. Or did you have your own version of mle.m that it was using instead of the toolbox version?

Answer 2

[Image Analyst]

TS is probably either a class or a structure. Global could be a field of the TS structure. Or if TS is a static class, Global could be a method of the static class. Or if TS is an instance of some class (with a different name) then Global could be a method or the class or a property of the class.

But why didn't you answer Walter's question when he asked you to put this in your code and tell us what it says:

class(TS)