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Re: problem with finverse in matlab2008
Posted:
Aug 1, 2013 10:50 AM


thank you i run ver and i have isntalled the Symbolic Math > Toolbox
Symbolic Math Toolbox Version 3.2.3 (R2008a)
how i get the inverse function? i must define the f(x) as a external function
thank you in advance
"Steven_Lord" <slord@mathworks.com> wrote in message <ktdp4f$7vs$1@newscl01ah.mathworks.com>... > > > "Loren Shure" <Loren.Shure@mathworks.com> wrote in message > news:ktdkma$odo$1@newscl01ah.mathworks.com... > > > > "george veropoulos" <veropgr@yahoo.gr> wrote in message > > news:ktd6lp$mvu$1@newscl01ah.mathworks.com... > >> Dear friends > >> > >> i run the following code in matlab 2008a (7.6.0) > >> syms x > >> f(x) = 1/tan(x); > >> g = finverse(f) > >> > >> and i have the following message > >> > >> > >> ??? Undefined function or method 'syms' for input arguments of type > >> 'char'. > >> > >> Error in ==> test1 at 1 > >> syms x > >> > >> what happened thnak you > >> george > > > > > > symfuns, such as f(x), didn't get introduced until R2013a, I believe > > George, > > You don't even reach the symfuns line but if you did you would encounter the > problem Loren mentioned. > > The problem that caused this error is that you don't have Symbolic Math > Toolbox in your installation or that it was not installed correctly. Check > the information displayed by the VER function; if it doesn't show Symbolic > Math Toolbox, you will not be able to use SYMS or perform symbolic > calculations. > >  > Steve Lord > slord@mathworks.com > To contact Technical Support use the Contact Us link on > http://www.mathworks.com



