# Question:Problem with plot

## Question:Problem with plot

Maple

Hi every one, I'm trying to plot the function f which is functions in terms of Bessel functions:Here is the code plz any advise i'll be grateful.

restart:
assume(d,real):assume(t,real):omega:=10^6:Digits:=15:assume(n,real):Delta:=0:
N:=1:N1:=1+2*N;M:=sqrt(N*(N+1));alpha:=M/(2*omega):z(0):=-1:
3
(1/2)
2
I1:=simplify(Sum(BesselJ(n,-I*alpha)*(1/(N1+I*2*omega*n))*(exp((N1+I*2*omega*n)*t)-1),n=-10..10)):

sz:=z(0)*exp(-N1*t)*exp(-alpha*sin(2*omega*t))-exp(-N1*t)*exp(-alpha*sin(2*omega*t))*I1:
I3:=Sum((BesselJ(n,-2*alpha)*(-1)^n+BesselJ(n,-2*I*alpha))*exp(-(N1-I*Delta+2*n*omega)*t),n=-infinity..infinity):
w:=laplace(I3,t,s): w1:=subs(s=I*d,w):
w2:=limit(sz,t=infinity):
Need to plot f
f:=w1*w2:
with(plots):plot(Re(f),d=0..5,tickmarks=[2, 2],thickness=2,linestyle=1,color=black,axes=boxed,titlefont=[SYMBOL,14],font=[1,1,18],tickmarks=[2,3],thickness=2);
Warning, unable to evaluate the function to numeric values in the region; see the plotting command's help page to ensure the calling sequence is correct

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