consider preallocating for speed

so i was wondering is there any way for fixing it i just don't want to use this :

theta_2= zeros(i,1);

th_2 =zeros(i,1);

A_X =zeros(i,1);

A_Y=zeros(i,1);

for each and indivual outputs before my for loop

this is my script

for i=1:360

theta_2(1)= 0; % initial angle for link 2

theta_2(i)=i;

th_2(i)= theta_2(i)*pi/180; % theta 2 in radians

% using equation from book to calulate the postion of the links

% position of link 2 (AO2)

A_X(i) = R2*cos(th_2(i)); % position x of link 2

A_Y(i) = R2*sin(th_2(i)); % position y of link 2

end

i have so much more to put in this for loop and i don't want to get that warrning

Answer 1

[David Hill]

No for-loop needed. No preallocation needed here.

theta_2=1:360;
th_2=theta_2*pi/180;%you could use cosd() and not need to convert
A_X=R2*cos(th_2);
A_y=R2*sin(th_2);

[Shaghayegh Ghandali]

omg i never though about that thank you