Week4 Build and Analyze A Dataset
Variable refers to a quantity whose value can be changed. Variables are expressed in non numerical symbols, usually in Latin letters. The purpose of variables is to generalize the way instructions are described. The results can only be true values, and instructions can only be applied in certain situations. Variables can serve as retainers for any one of a specific type of value
(1)Continuous: Variables that can take arbitrary values within a certain range are called continuous variables, such as height, weight, etc
(2)Discrete:Variables whose numerical values can only be calculated in natural or integer units, such as the number of employees, can only be counted in units of measurement.
(3)Ordinal:A variable whose value only indicates the order of the attributes of a thing in terms of quantity, size, and quantity. It can be observed through sequential scales.
(4)Nominal:>The main description attribute is a variable used to distinguish different attributes of the same thing, such as brand, nature, type, etc.
