i have errors in variation of y for plotting

so heres my code

and the problem i keep getting

[KSSV]

Check the dimensions at plot function. Attach your code here or copy here. Image will not help us to help you.

[Christella Bañaga]

%A 30-volt electromotive force is applied to an LR - series circuit in which the inductance is 0.1 henry and the resistance is 50 ohm.
%Find the current i(t) if i(0)=2.  Determine the current as t approach infinity.

%Setup the variables I(t) as the function of Current over a period of time t,  
%Find also the derivative of I(t) and set as dI
syms I(t);
dI=diff(I,t);

%Initial Conditions
cond1 = I(0) == 2
L = 0.1 %Inductance
R = 50 %Resistance
E = 30 %Voltage

%Set the differential equation model as eqn1;
eqn1 = L*dI + R*I == E;
subs(eqn1, I(t))
%Solve for Isoln as the equation of current at any time t. 
Isoln = dsolve(eqn1 , cond1) 

%Set I steady as the current at t approach infinity.
Isteady = limit(Isoln , inf)

%Set the final time as the 5L/R
tfinal = 5*L/R;

% Plot the equation: Use the Title=Current in RL Circuit, XValue=Time (in Sec), YValue=Current (Amps)
Title = "Current in RL Circuit";
XValue = "Time (in Sec)";
YValue = "Current (Amps)";
%Use the domain (0, tfinal) with 100 points 
x=linspace(0,tfinal);
t=linspace(100,100);
y= Isoln;
plot(x,t);
hold on;
grid on;
title(Title)
xlabel(XValue),ylabel(YValue);

[Christella Bañaga]

Values of y for plotting

0% (7%)

Variable y must be of size [100 100]. It is currently of size [1 1]. Check where the variable is assigned a value.

the above statement is my error

[DGM]

The way you're using linspace to define y results in a constant vector. That's going to just give you a straight line.

Why is the assignment saying that y should be 100x100? There's only one independent variable. The output should be a vector. What am I missing?

%Setup the variables I(t) as the function of Current over a period of time t,  
%Find also the derivative of I(t) and set as dI
syms I(t);
dI=diff(I,t);

%Initial Conditions
cond1 = I(0) == 2

cond1 = 

L = 0.1 %Inductance

L = 0.1000

R = 50 %Resistance

R = 50

E = 30 %Voltage

E = 30

%Set the differential equation model as eqn1;
eqn1 = L*dI + R*I == E;
subs(eqn1, I(t))

ans(t) = 

%Solve for Isoln as the equation of current at any time t. 
Isoln = dsolve(eqn1 , cond1) 

Isoln = 

%Set I steady as the current at t approach infinity.
Isteady = limit(Isoln , inf)

Isteady = 

%Set the final time as the 5L/R
tfinal = 5*L/R;

% Plot the equation: Use the Title=Current in RL Circuit, XValue=Time (in Sec), YValue=Current (Amps)
Title = "Current in RL Circuit";
XValue = "Time (in Sec)";
YValue = "Current (Amps)";

%Use the domain (0, tfinal) with 100 points 
x = linspace(0,tfinal); % 1x100
y = subs(Isoln,x); % 1x100
plot(x,y);
hold on;
grid on;
title(Title)
xlabel(XValue),ylabel(YValue);

[Christella Bañaga]

THANK YOU SO MUCHHHH