sym file in matlab

can anybody tell how to check the roots in sym file of matlab?

[Do Van]

How to buy licsence Symbolic Math Toolbox?

[Rik]

You can buy it on the website here, and you can even go through the AddOn Manager.

Answer 1

[Kojiro Saito]

which sym -all

If Symbolic Math Toolbox is installed, it returns MATLAB_ROOT\toolbox\symbolic\symbolic\@sym\sym.m as of R2021a.

[Ali]

No I am using matlab R2020a. I cannot find this option

[Kojiro Saito]

In R2020a, sym points toolbox\symbolic\symbolic\@sym\sym.m, too.

Please confirm you have installed Symbolic Math Toolbox by executing ver command.

ver

If the toolbox is installed, you will find "Symbolic Math Toolbox" in the ver result.

If not, you need to install the toolbox.