Note_Tech

All technological notes.

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Machine Learning

Machine Learning is making the computer learn from studying data and statistics.
Machine Learning is a step into the direction of artificial intelligence (AI).
Machine Learning is a program that analyses data and learns to predict the outcome.
Data Set
- In the mind of a computer, a data set is any collection of data. It can be anything from an array to a complete database.
Data Types
Three main categories:
- Numerical 数值: Numerical data are numbers, and can be split into two numerical categories
  - Discrete Data 非连续: numbers that are limited to integers.
    - Example: The number of cars passing by.
  - Continuous Data 连续数据: numbers that are of infinite value.
    - Example: The price of an item, or the size of an item
- Categorical 分类数据: Categorical data are values that cannot be measured up against each other.
  - Example: a color value, or any yes/no values.
- Ordinal 有序资料: Ordinal data are like categorical data, but can be measured up against each other.
  - Example: school grades where A is better than B and so on.