syms variable also a variable of loop

Hi all,

I am using t as syms variable and also as the variable inside loop.I am not sure whether they are connected in the code below. They need to represent the same. Is there a way I can get rid of syms and keep integration part (y2) also inside the loop? Your suggestion will be highly appreciated.

Thanks

Dharma

.....................................................................................................................................

a=0.0799;
 b=5.85;
 N=2000;
 dt=0.05;
%
syms x t
c2(x) = (dirac(x-1) + dirac(x-3)+dirac(x-5)+dirac(x-7)+dirac(x-9)+dirac(x-11))*4;
inner2 = c2(x)* exp(-10*(t-x));
y2 = matlabFunction(simplify(int(inner2, x, 0, t)));
%
t=zeros(N,1);
K=zeros(N,1);
t(1)=0;
K(1)=20; 
for i=1:N
    for j=1:N
        t(i+1)=t(i)+dt;
                  K(i+1)=K(i)-a*dt*K(i)-b*dt*t(i)*y2(t(i))*K(i);
    end
end

[KSSV]

Code looks fine. But why you want two loops here?

for i=1:N
    for j=1:N
        t(i+1)=t(i)+dt;
                  K(i+1)=K(i)-a*dt*K(i)-b*dt*t(i)*y2(t(i))*K(i);
    end
end

Wont a single loop work?

[Dharma Khatiwada]

Thanks!

I was trying to make just one loop. Please ignore the another loop. But, I am trying to run integration part (pasted below) also inside loop so that there can be just one loop of t.

syms x t

c2(x) = (dirac(x-1) + dirac(x-3)+dirac(x-5)+dirac(x-7)+dirac(x-9)+dirac(x-11))*4;

inner2 = c2(x)* exp(-10*(t-x));

y2 = matlabFunction(simplify(int(inner2, x, 0, t)));

Is is feasible? Also, can I just get rid of syms x,t?

[KSSV]

You can substittue the values of x and t in y2.

[Dharma Khatiwada]

Could you please give the detail of such steps?

Thanks

[KSSV]

Already you are doing it right?

y2(t(i))

Answer 1

[Dharma Khatiwada]

It is working right but it takes longer time to run. I am trying to see if the integration can also be kept inside to see relatively shorter runtime.

Please let me know.