I want to move an object along Y axis up and down. how can I do this? Thanks in advance.

made this using function

Obs5 = [125 0];
obst(125,0,5,1)

function obst(x,y,r,n)
    theta= linspace(0, 2*pi,n);
    x1= x+r*cos(theta);
    y1= y+r*sin(theta);
    plot(x,y,'o','markerfacecolor','g','markersize',6),hold on
    plot(x1,y1,'r-')
    axis equal
end

Answer 1

[Max Heimann]

Do you just want to offset the data once or do you want to move it after you already plotted it?

For offsetting just once, just add the offset to your y vector.

plot(x1,y1 + offset,'r-')

If you want to move an existing line you can store the handle when you plot it the first time and then modifiy it with the set command.

% plot and store handle
handleOfLine = plot(x1,y1,'r-');
% change data
set(handleOfLine,'YData',y1 + offset);
% refresh the figure
drawnow

Place this into a loop and add a pause() call somewhere and you can create a moving plot.