MATLAB: How to store all the values of for loop in a single variable

loop

clc

clear all

for i=17.890:+0.005:17.920

a=i

end

I am getting different values of a after running the program, but I want an array

Best Answer

In your case its simply a=i but you have asked it for clarifcation so the illustration is as follows:

i=17.890:0.005:17.920;
a=zeros(size(i)); % preallocate
for k=1:numel(i)
    a(k)=i(k);  % index with loop iterator (k)
end
a

Related Solutions

MATLAB: How to add the values of each iteration of a for loop, where the index is k=0:0.001:.30, into a matrix so that I can plot the values

If H is scalar you can vectorize the problem :

 k=0:0.001:0.30;
 H=2;
 y=3.065-(8.871*(k/H))+(14.036*(k/H).^2)-(7.219*(k/H).^3);

Using the loop, the index must be an integer, to respect this condition you can proceed as :

 k=0:0.001:0.30;
 for t=1:length(k)
    y=3.065-(8.871*(k(t)/H))+(14.036*(k(t)/H).^2)-(7.219*(k(t)/H).^3);
    x(:,t)=y; % store y as kth column of x
 end

MATLAB: How to insert values from a for loop into an array

Remember matlab index starts from one not from zero!

Without Loop (faster) :

a = 500
b = 1000
i=0:0.05:2;
elements = a * i ;
area = b + elements  ;

With Loop :

First method:

a = 500;
b = 1000;
ctr=1;
i=0:0.05:2;
area=zeros(1,numel(i)); % preallocate

for i=i
    elements = a * i ;
    area(ctr) = b + elements ;
    ctr=ctr+1;
end

Second method:

a = 500;
b = 1000;
ctr=1;
i=0:0.05:2;
area=zeros(1,numel(i)); % preallocate
for k=1:numel(i)
    elements = a * i(k) ;
    area(k) = b + elements  ; 
end

Best Answer

Related Solutions

MATLAB: How to add the values of each iteration of a for loop, where the index is k=0:0.001:.30, into a matrix so that I can plot the values

MATLAB: How to insert values from a for loop into an array

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