for loop, multiple plots in single plot

Hello MATLAB community,

I am working on this projectile problem and I am utilizing the for loop command for several times. But I really feel like there must be a cleaner way to do it by using only one for loop command, but I am not sure though. And also, is there any way I can find the specific index where the hPluto is 0 and so forth with the other h's?

Vi = 25;
t1 = [0:0.1:86.3];
t2 = [0:0.1:13.5];
t3 = [0:0.1:13.5];
t4 = [0:0.1:6];
g = [0.58 3.7 3.71 8.87]
for i = 1:length(t1)
    hPluto = Vi .* t1 - 0.5 .* g(1) .* t1 .^ 2;
end
for i = 1:length(t2)
    hMercury = Vi .* t2 - 0.5 .*g(2) .* t2 .^2;
end
for i = 1:length(t3)
    hMars = Vi .* t3 - 0.5 .*g(3) .* t3 .^2;
end
for i = 1:length(t4)
    hVenus = Vi .* t4 - 0.5 .*g(4) .* t4 .^2;
end

%[valmax, indmax] = max(hVenus); I used to get an idea of where the maximum value of the graph is
% so I can multiply the index by 2 to get the value of t.
plot(t1, hPluto, t2, hMercury, t3, hMars, t4, hVenus)

Answer 1

[Bhaskar R]

Vi = 25;
t1 = [0:0.1:86.3];
t2 = [0:0.1:13.5];
t3 = [0:0.1:13.5];
t4 = [0:0.1:6];
g = [0.58 3.7 3.71 8.87];
hPluto = Vi .* t1 - 0.5 .* g(1) .* t1 .^ 2;
hMercury = Vi .* t2 - 0.5 .*g(2) .* t2 .^2;
hMars = Vi .* t3 - 0.5 .*g(3) .* t3 .^2;
hVenus = Vi .* t4 - 0.5 .*g(4) .* t4 .^2;
plot(t1, hPluto, t2, hMercury, t3, hMars, t4, hVenus);

ind = find(hPluto == 0);