How to create a plot with this values

I need to modify this code, I do get all the efficiency Values but I do not how I could plot it. the plot will be Efficiency vs j (increments from 0.7 to 1 )

for j=0.7:0.01:1
    h2=h1+((hT2s-h1)/(j));
    hT4=hT3-(j)*(hT3-hT4s); 
    Efficiency=1-(hT4-h1)/(hT3-h2);
end

Answer 1

[Geoff Hayes]

David - just create an array of the efficiency values which you will update on each iteration of the loop. For example,

 increments = 0.7:0.1:1;
 efficiencies = size(increments);
 for k=1:length(increments)
     j = increments(k);
     h2=h1+((hT2s-h1)/(j));
     hT4=hT3-(j)*(hT3-hT4s); 
     efficiencies(k) = 1-(hT4-h1)/(hT3-h2);
 end
 plot(increments, efficiencies);

Answer 2

[Akira Agata]

I believe you can avoid for-loop by vectorizing variables. Assuming h1, hT2s, hT3 and hT4s are constant value, you can calculate Efficiency vs x = 0.7:0.01:1 and plot them by:

h1 = 1;
hT2s = 2;
hT3 = 3;
hT4s = 4;

x = 0.7:0.01:1;
h2 = h1+((hT2s-h1)./x);
hT4 = hT3-x*(hT3-hT4s);
Efficiency = 1-(hT4-h1)./(hT3-h2);

plot(x,Efficiency)