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Is time of day categorical variable?
Hour of the day isn’t best represented as a categorical variable, because there is a natural ordering of the values.
Is time of day a continuous variable?
For example, you could be: 25 years, 10 months, 2 days, 5 hours, 4 seconds, 4 milliseconds, 8 nanoseconds, 99 picosends…and so on. Time is a continuous variable.
Is time of day numerical or categorical?
Categorical variables are also called qualitative variables or attribute variables. The values of a categorical variable are mutually exclusive categories or groups….Examples of categorical variables.
| Data type | Examples |
|---|---|
| Date/time | Days of the week (Monday, Tuesday, Wednesday) Months of the year (January, February, March) |
When to categorize continuous predictor in a regression model?
Numerical predictors are usually coded with the actual numerical values while categorical variables are often coded with dummy variables—0 or 1. If you are not getting into the details of coding schemes, and all the values of the predictor are 0 and 1, you will not see any real information about the distance between them.
When to use categorical, discrete, and continuous variables?
If you have a discrete variable and you want to include it in a Regression or ANOVA model, you can decide whether to treat it as a continuous predictor (covariate) or categorical predictor (factor). If the discrete variable has many levels, then it may be best to treat it as a continuous variable.
When to treat a predictor as a continuous variable?
Treating a predictor as a continuous variable implies that a simple linear or polynomial function can adequately describe the relationship between the response and the predictor. When you treat a predictor as a categorical variable, a distinct response value is fit to each level of the variable without regard to the order of the predictor levels.
Is the hour of day a continuous or categorical variable?
It is best thought of as a discrete ordinal variable. It has an added characteristic of being cyclic, since 12am follows 11pm and precedes 1am. Theoretically, it depends on how you format the variable i.e. it can be “continuous” (modeled with a single coefficient) or categorical (a coefficient per “hour” of day).