Early ideas of a recommendation system ➖
Cold start problem simply means in the start there was no data or stats to establish any sort of graphical relation and hence there would be vacant recommendation at the start
Third solution is assigning numbers to each item and then find closeness
But it only solves T.C. problem of 2nd solution that is reducing solution from 2D array to 1D array it fails to establish well relationship and also new items insertion problem etc.
A vector is a numerical representation of data in the form of an array of numbers that captures the meaning or features of that data in a mathematical space.
In simple words:
👉 Text, image, audio, or user behavior converted into numbers.
Example:
"web dev course" → [0.12,-0.88,0.45, ...]
