# how to store values from loop in vector

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Manora Mony on 24 Sep 2021
Answered: DGM on 24 Sep 2021
hi
i wrote a code reprated from p = -20 to 30 and each loop gives result 'rate' ,
how i can draw rate from each loop with p
or how i can store rates in vector to draw it with p (vector)

Cris LaPierre on 24 Sep 2021
See Ch 13 of MATLAB Onramp (Programming) for an interactive introduction to using for loops. You can also find some examples of how to store values calculated in each loop in the documentation of for loops:
s = 3;
H = zeros(s);
for c = 1:s
for r = 1:s
H(r,c) = 1/(r+c-1);
end
end
H
H = 3×3
1.0000 0.5000 0.3333 0.5000 0.3333 0.2500 0.3333 0.2500 0.2000

DGM on 24 Sep 2021
Not knowing what exactly you're doing, it's hard to give an exact or potentially simplified answer, but here's an example.
p = -20:30; % if you need p outside the loop, save it
rate = zeros(size(p)); % preallocate vector
for k = 1:numel(p)
rate(k) = k.^2 + 100*sin(p(k)/2); % store each result
end
plot(p,rate) Of course, the above example can be simplified, so keep that in mind.
p = -20:30;
rate = (1:numel(p)).^2 + 100*sin(p/2);
plot(p,rate) 