undefined function max for sym matlab

I am generating a code to find reference signal from pid gain values ,but couldnt find maximum for the reference signal,could you please help me out of this problem,i am attaching the code which i am working: Kp=0.4662; Kd=0.2546; Ki=0.2456; Ei=60 F=laplace(Ei,s) Eo=((Kp+Ki/s+Kd*s)*F); F1=Eo; ref=ilaplace(F1,t1) st=0.1; % simulation period in seconds Ts=1e-6; % sampling peiod in seconds t=0:Ts:st; Cont=7*sin(2*pi*50*t); Ar1=(7*ref) Ar=max(Ar1)

Answer 1

[Star Strider]

Use the norm function.

From the documentation:

• norm(A,inf) is computed as max(abs(V)).

[preethamrengarajan kannan]

I tried this but the error i received was "Undefined function 'norm' for input arguments of type 'sym'."

[Star Strider]

That’s strange. The documentation page I linked to is clearly part of the Symbolic Math Toolbox, because I specifically chose it from the other options. The online documentation is for R2014b, so if you have an earlier version, the norm function may not be available. I don’t know when it was introduced.

Search ‘Help’ in your version documentation under ‘Linear Equations’ to see what functions you have available.