Plotting data from for loop

Here is my code:

T=290;

R=287;

G=1.4;

Cv= R/(G-1);

e=Cv*T;

V= (0:1:1000);

Ke= .5*(V.^2);

for i = 1:1:length(V)

      Ratio(i)= Ke(i)/e;

      plot(Ratio);

      hold on
  end

Basically I want to plot "Ratio" with all of the stored Ke values on the graph. When I run the code, it gives me a thousand sets of a thousand entries instead of just 1 set with a thousand entries. All of the sets are the same, I just don't know why it is producing that many sets.

Answer 1

[KSSV]

It is because, you are plotting Ratio inside the loop and you have not mentioned the X data. You can plot Ratio outside the loop.

T=290;
R=287;
G=1.4;
Cv= R/(G-1);
e=Cv*T;
V= (0:1:1000);
Ke= .5*(V.^2);
Ratio = zeros(size(V)) ;
for i = 1:1:length(V)
    Ratio(i)= Ke(i)/e;
end
plot(Ratio);

It can be vectorised without loop as below:

% Vector
Ratio = Ke/e ;

[Alec Carruthers]

Thank you for the help. Your code gives me the same data, but it is only one set instead of a thousand.

[KSSV]

How it can be thousand?