You need to proceed something like shown below:
function main()
%Graphing position in free fall vs time(by 1 sec)
%(in respect to the ground)
prompt = 'Please give intial velocity in m/s: ';
v0 = input(prompt);
prompt = 'Input intial height in meters: ';
y0 = input(prompt);
Y = findypos(v0,y0) ;
plot(Y)
end
function Y = findypos(v0,y0)
t = 0; %Time
g = 9.81; %m/s^2
ypos = y0 ;
count = 1 ;
Y(count) = y0 ;
while ypos >= 0
y = y0+v0*t-0.5*g*t.^2; %Y position from initial y
ypos = y0-y; %y pos from ground
t=t+1; %time step
count = count+1 ;
Y(count) = ypos ;
end
end
