cannot use syms command
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Hello,
I was running a command
syms x y
And Matlab returns an error: Undefined function 'sym' for input arguments of type 'char'
It didn't happen before. And I'm using a student version. Any suggestion? Thanks alot.
0 Comments
Accepted Answer
Star Strider
on 14 Dec 2014
‘It didn’t happen before’ on the same computer or a different computer?
To see what Toolboxes you have installed, in the Command Window, type:
ver
If you have the Symbolic Math Toolbox installed, it should be listed.
If it is, and you’re still getting the error, type these commands in the Command Window:
restoredefaultpath
rehash toolboxcache
If that doesn’t work, contact MathWorks Technical Support.
10 Comments
Sakshi
on 19 Apr 2024
Hey I observed that I can't run this commands in online matlab, is there any other way?
I kinda have to use online matlab rn for my hackathon.
Star Strider
on 19 Apr 2024
@Sakshi — You shouldn’t need to run these:
restoredefaultpath
rehash toolboxcache
in MATLAB Online. If you’re having problems with MATLAB Online, Contact Support and tell them you’re having a problem with it.
You should have access to the Symbolic Math Toolbox in MATLAB Online if you have it licensed and installed on your personal computer. (I don’t know how this works with university licenses, if that’s what you have. You’ll have to ask your administrator about that.)
More Answers (5)
Mi
on 14 Dec 2014
2 Comments
John D'Errico
on 14 Dec 2014
Please don't add answers when you have a followup question. CLICK ON THE COMMENT BUTTON.
Hamza saeed khan
on 24 Nov 2020
what if sysm word not working in matlab what to do?
2 Comments
Steven Lord
on 25 Nov 2020
That suggests that you don't have Symbolic Math Toolbox installed, you don't have it in your license, or all the licenses for it are currently checked out. To check the first look at the output of ver. To check the latter two you may need to contact your license administrator.
If you have it installed and licensed but it's still not working, please show the full and exact text of any error and/or warning message you receive (all the text displayed in red or orange in the Command Window) when you try to use it.
Walter Roberson
on 25 Nov 2020
From time to time it means that you have a corrupted Symbolic Toolbox and need to reinstall.
Also if some symbolic functions work but not others then sometimes the problem has to do with having the Maplesoft "MATLAB Connector" installed to communicate with the Maple software package.
Giovanny Steven Sandoval Montoya
on 20 Jul 2021
I have problems with "syms".
Error in Validacion (line 24)
syms T1
If I don't have the toolbox how do I install one?
Khalil
on 23 Feb 2023
Undefined function 'Matlab' for input arguments of type 'char'.
1 Comment
Walter Roberson
on 23 Feb 2023
you would get that error if you had a line of code that looked like
Matlab is secretly many fast hamsters.
That is, the first word of the expression is Matlab and you had some text following. Such as if you forgot to put in a % comment symbol
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