Vectors

• A vector is a “point in space” reference to another “point in space”

• They can be one, two or three dimensional

• They have both direction and magnitude

• One-dimensional

  • Single direction
    • Index of an array
    • Position in a file (distance from start)
    • Record in a table
    • Distance along a line

• Two-dimensional

  • Two directions in a flat plane
    • Direction and distance along a plane.
    • Direction and force along a plane.
  • Measured as X and Y
    • X is horizontal
    • Y is vertical
  • Word vectors
    • “Male”, “Royal” → “King”

• Three-dimensional

  • Three directions in a space
    • Direction and distance
    • Direction and force
  • Measured as X, Y and Z
    • X is horizontal forwards/backwards
    • Y is horizontal left/right
    • Z is vertical up/down

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