Is Time A Continuous Variable

The subject of is time a continuous variable encompasses a wide range of important elements. time is a continuous or discrete variables? Finally, models designed for continuous variables can in many cases be used with discrete variables (but using models for discrete data with continuous variables is rather a bad idea). Is time continuous or discrete? - Physics Stack Exchange.

Edit: If time appears discrete (or continuous) at some level, it could still be continuous (or discrete) at higher resolution. This is due to general reasons that have nothing to do with time per se. When do we choose time as a categorical or continuous variable in .... I understand that we can use time as a categorical or continuous variable in multilevel models (MLM). Similarly, in which cases would it be better to use time as a categorical variable?

And how is the analys... When is time treated as a discrete variable? Time is usually treated as a continuous variable but in some cases it is discrete.

An example would be with a drug study and measurements are taken at 1, 2 and 3 hours. regression - Linear Model for Longitudinal data: Should time be a .... In this example, they treat time as a continuous variable (values ranging from 0 to 2 representing years from 2008). Additionally, what are the implications of treating it as an integer rather than as a factor?

Linear mixed model: Time as continuous or discrete variable?. Would it make more sense to run the model with time as a categorical variable or to include a quadratic time variable and run it as continuous? Both approaches seem to depict the actual observation when plotting the predicted values as a graph.

RM ANOVA: time as continuous or categorical? Should Time be treated as a continuous or a categorical variable here? In my case, the measurements were done at 5 different times and the time intervals between each measurement are not equal. Survival analysis: continuous vs discrete time - Cross Validated. I am confused about how to decide whether to treat time as continuous or discrete in survival analysis.

It's important to note that, specifically, I want to use survival analysis to identify child- and household-level variable... Is hour of day a categorical variable? Hour of the day isn't best represented as a categorical variable, because there is a natural ordering of the values. Hair color, for example, is categorical, because the ordering of the categories has no meaning - {red, brown, blonde} is as valid as {blonde, brown, red}. How to interpret the interaction term of a time variable and a time ....

In my mixed effects model, the independent variables are t (the variable indicating time length, e.g., number of days), X (the time-varying variable), and t * X (the interaction of t with X).