how can I store this data in an array using loop?

Hello. I am trying to run the below code. but its not working. I want to run the loop 5 times and calculate the value of x for 5 temperatures and store in a matrix.

please help. thanks

a=1;                  
v=2;
p=1e-5;
vac=zeros(1,5);
T=[77,295,600,750,1234];
for i=1:length(T)
x=exp(a)*exp(-v/(p*T));
vac(i)=x;
end

Answer 1

[Birdman]

You don't need a loop. Try the following:

vac=exp(a).*exp(-v./(p.*T))

[Farhan Ashraf]

Hello, thank you for your time It's giving the following error. "Matrix dimensions must agree"

[Birdman]

It should not. Clear your workspace area and rerun the code.

a=1;                  
v=2;
p=1e-5;
T=[77,295,600,750,1234];
vac=exp(a).*exp(-v./(p.*T))

[Guillaume]

Note that the only operator that should absolutely be dotted is the ./. The others are multiplications with scalar so either .* or * work.

[Farhan Ashraf]

Thank you very much

Answer 2

[Guillaume]

You forgot to mention what it is not working mean: You get error using / Matrix dimensions must agree. That's because you forgot to index T so you're dividing a scalar by a vector which is not a valid matrix operation, so one way to fix your problem:

x = exp(a)* exp(-v/(p*T(i)));

However, you don't need a loop at all, you could use vectorised operations. For that you need to use ./ instead of /:

a = 1; v = 2; p = 1e-5;  %constants
T = [77, 295, 600, 750, 1234];
vac = exp(a)*exp(-v./(p*T))   %no loop needed

[Farhan Ashraf]

Thank you very much :)