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

arrayfor loopsloop storage

I have to insert values from a for loop into an array, but can't get it to work as the loop variable starts at 0. I have tried the two following approaches, but neither work. Any advice or critisism would be very helpful.
Attempt 1 – 
a = 500
b = 1000
for i=0:0.05:2
    elements = a * i 
    area(i) = b + elements   
end
Attempt 2 
a = 500 
b = 1000
area = [ ];
for i=0:0.5:2
    
    elements = a*i
    area = [b + elements]
end
Attempt 1 throws up an error message while attempt 2 just doesn't insert the values into an array. Any help would be appreciated. Thank you!

Best Answer

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
Related Question