Need help storing and using values from an array

I'm trying to learn how to store values in an array. I was trying to create a list of 200 values for Tin which is the temperature using the last value of Tin for the next as well. t is the time ranging from 1:200. I coudn't find any relevant sources online :( Thanks for any help. If there are any questions I would happily explain the parts of my code. (Sorry for reupload -- I wasn't getting any useful help). I haven't used arrays before and the ones on the internet weren't any help, so go easy on me.

clear
t=zeros(200,1); %unsure
h= 1.6;
w=1.2;
l=1.8;
a=40;
Tin = 5;
Tout=5;
Theater=40;
M=0.25;
dt=1;
heaterState = 1;
Tlower = 21;
Tupper = 24;
dT=0;
c=1005.4;
for t1=1:200 % t is the time and 
    
    Tin = Tin+dT;
    if Tin>Tupper
        heaterState =0;
    elseif Tin< Tlower
        heaterState =1;
    
    end
 
      
    [Qloss,m] = getQloss(Tin,Tout,dt,h,w,l,a);
    
    if heaterState ==1
       [Qheat] = getQheater(Tin,Theater,M,dt);
    else
        Qheat = 0;
    end
     
    dT = (Qheat - Qloss)*(1/(m*c));
    t(t1)=norm( %unsure
end

Answer 1

[Image Analyst]

You need to index Tin in your loop:

Tin(t1) = ....whatever......t1 must be an integer.
something = .... Tin(t1) ... use Tin(t1) instead of Tin.

If Tin is supposed to be 5 the first time through, do this:

if t1 == 1
    Tin(t1) = 5;
else
    Tin(t1) = Tin(t1-1) + dt;
end

Then everywhere else in your loop that you use Tin, you need to use Tin(t1) instead.