Array indices must be positive integers or logical values.

syms s;
t=10:0.1:100;
impulse=t==0;
f=32/(s-8);
y=subs(f,s,t);
impulse(y);
plot(y,[impulse]);
xlabel('x');
ylabel('y');

Array indices must be positive integers or logical values.

someone know how is this? i am starting with matlab i dont know why this happening.

[Stephen23]

syms s
t=10:0.1:100;
impulse=t==0;
f=32/(s-8);
y=subs(f,s,t)

y = 

impulse(y)

Array indices must be positive integers or logical values.

'impulse' appears to be both a function and a variable. If this is unintentional, use 'clear impulse' to remove the variable 'impulse' from the workspace.

What do you expect an index of e.g. 320/21 to return?

[kaze]

%no tengo ni idea, necesito representar grafica la respuesta de estos sistema a la funcion impulso. con %condiciones iniciales nulas

%siendo:

I have no idea, I need to graph the response of these systems to the impulse function. with null initial conditions

being:

f1=32/(s-8)

f2=1280/(s^2 + 16*s + 640);

f3=f=(3456*s+3456)/(s^2+576);

[Walter Roberson]

impulse=t==0;

That assigns impulse to be a variable, overriding its existence as a function. Within the rest of the scope, you can no longer call impulse as a function.

[KSSV]

You need to define impulse properly. What is impulse?