3d trajectory plot

Im trying to create a 3d plot of 10 trajectories. I have the equation for the z axis and the x axis as an array. However i would like to start the plot at a point along the y axis instead of zero. I know how I want to go plotting the trajectories, it's getting the plot to start at a given point on the y axis. For example starting at the point (0 24 0) or (0 26 2).

[Ameer Hamza]

What are the equations of these trajectories?

[darova]

What is the question?

[Tyler Hajovsky]

v= 6.5;%ft/s
g= 32.2; %ft/s^2
theta= 30; %degrees
x= 0:.1:2;
y= randi(48);
z1= (x*tand(theta)-((g*x.^2)/(2*v^2*.75)));

plot3(x,y,z1)

Above is the code i have so far. I want to treat the y axis as the beginning of the trajectory. However i wish to start the trajectory at a given y coordinate between 0 and 48. So my question is how to start the trajectory at a specific y coordinate. Also disregard the "y= randi(48)" i know that it is wrong.

[Tyler Hajovsky]

This is the plot of the trajectory in 2d, given that the code for this plot is "plot(*x,z1)". I would like to make this plot 3d by adding in the y axis and starting the trajectory at a specific y coordinate.

Answer 1

[Ameer Hamza]

Try this

v= 6.5;%ft/s
g= 32.2; %ft/s^2
theta= 30; %degrees
x= 0:.1:2;
y= randi(48)*ones(size(x));
z1= (x*tand(theta)-((g*x.^2)/(2*v^2*.75)));
plot3(x,y,z1)
grid on
xlabel('x');
ylabel('y');
zlabel('z');

[Tyler Hajovsky]

YEEEESSSSSSS. Thank you so much, did you just create an empty array the size of x?

[Ameer Hamza]

It is not empty array. It is array of all ones. I have updated the code to clarify it.

[Tyler Hajovsky]

Thank you so much!!

[Ameer Hamza]

Glad to be of help.