how do i get the sigmas out of the livescript display?
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Hi Everyone,
I am currently working with a very long equation. And when I output it in the livescript, MATLAB finds several sigmas (see screenshot). I would like to have this equation with the sigmas in order to process it in another function.
So far I have tried [r,sigma] = subexpr(expr). I cancelled this command after more than 1 hour of calculation. In addition, subexpr, if I have understood it correctly, only looks for one sigma.
I hope someone here can help me.
I am working with Matla 2017b and the symbolic toolbox
1 Comment
Steven Lord
on 29 Jul 2024
And when I output it in the livescript, MATLAB finds several sigmas (see screenshot). I would like to have this equation with the sigmas in order to process it in another function.
What specifically do you mean by "process"? Do you mean you want to substitute values into it using subs? You can do that even if it is displayed with subexpressions.
Do you want to display it without those subexpressions being pulled out? If so, what are you going to do if the expression turns out to take many, many screens or pages of output to display? Do you truly need or want to display say 50 or 100 pages of equations? That seems to me to not be very useful.
Answers (3)
Nikhil Sonavane
on 19 Feb 2021
Currently, subexpr function gives only one sigma as you correctly mentioned. I have brought this issue to the concerned people and it might be considered in any future release.
Walter Roberson
on 19 Feb 2021
Edited: Walter Roberson
on 19 Feb 2021
Complete hack:
ML = getMathMLForSym(rxppcol); %undocumented internal function
and parse the returned MathML to decode the sigma expressions
2 Comments
Walter Roberson
on 29 Jul 2024
What you are seeing affects only the display of the text. The text is still stored inside the variable, and can be manipulated that way. You can display parts of the text by subscripting the variable.
Anand Asokan
on 29 Jul 2024
Edited: Walter Roberson
on 29 Jul 2024
Use
sympref('AbbreviateOutput',false);
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