Storing values from a loop in an array

Hi everyone!

I'm trying to run a loop that saves every value after every iteration until it reaches 0 at which point the loop ends.

My code is as follows:

for y = [y;]
    if y>=0
        dV_y = (dt/m)*((0.5*rho*C_D*S)-m*g);
        dy = dV_y*dt;
        y = y+dy;
    end
end

The loop runs 1 time and doesn't save it as an array.

Any help will be greatly appreciated, thanks!

Answer 1

[Matt J]

N=1e7; %Maximum allowed number of iterations.

ysave=nan(1,N);
for i=1:N
        dV_y = (dt/m)*((0.5*rho*C_D*S)-m*g);
        dy = dV_y*dt;
        y = y+dy;
        
        ysave(i)=y;
        if y<0, 
            break;
        elseif i==N
            warning 'Stopping threshold was not reached.'
        end
end

y=ysave(1:i);

[Jamie]

Hi Matt,

Thanks, worked like a charm!