'latex' is invalid for 'port_label' drawing command parameter 'Interpreter' in block '.....'

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Aman Jacknoon
Aman Jacknoon 2016-11-20
评论： Walter Roberson 2016-11-20
I created and masked a subsystem in MATLAB Simulink, I want to label one of the output port with Latex expression using the following command:
port_label('output',1,'\dot{\theta}(t)','Interpreter','latex')
But it gives me the following error message:
'latex' is invalid for 'port_label' drawing command parameter 'Interpreter' in block '.....'
How can I label an output or input of a subsystem using 'Interpreter'. More specifically, How can I use the latex symbol '\dot{}' which represent the first derivative of a variable?
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Aman Jacknoon
Aman Jacknoon 2016-11-20
Thanks Mr. Walter Roberson for your response.
I have tried 'interp' instead of 'Interpreter', but both didn't work for me.
Walter Roberson
Walter Roberson 2016-11-20
I found a number of places where port_label was used but no definition of it.
Hmmm, the reference I just found suggests that it is handled by set_param. Unfortunately that is a built-in so I cannot examine the source.

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