Time for action - instantiating a cell array

1. 1. To instantiate a cell array with the same data as the projectile structure above, we can use:

octave:44> projectile = {10.1, [1 0 0], "Cannonball"}
projectile =
{
[1,1] = 10.1
[1,2] =
1 0 0
[1,3] = Cannonball
}

• The numbers in the square brackets are then the row indices and column indices, respectively.

1. 2. To access a cell, you must use curly brackets:

octave:45> projectile{2}
ans =
1 0 0

1. 3. You can have two-dimensional cell arrays as well. For example:

octave:46> projectiles = {10.1, [1 0 0], "Cannonball"; 1.0, [0 0 0], "Cartridge"}
projectile =
{
[1, 1] = 10.100
[2, 1] = 1
[1, 2] =
1 0 0
[2, 2] =
0 0 0
[1, 3] = Cannonball
[2, 3] = Cartridge
}

1. 4. To access the values stored in the cell array, simply use:

octave:47> projectiles{2,3}
ans = Cartridge

What just happened?

Command 44 instantiates a cell array with one row and three columns. The first cell contains the mass, the second cell the velocity, and the third cell the string "Cannonball...