categorical variable

categorical variable

Categorical variable is a variable for which the values don’t tell us anything about quantity; the values simply tell us which category the object belongs to.

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    • factor (in R)

      Factor (in R) is a type of R object that is a categorical variable.

    • confounding variable

      Confounding variable is a variable that, though not measured, causes variation in both the explanatory variable and the outcome variable; also know as a "lurking variable" or a "third variable".

    • outcome variable

      Outcome variable is a variable whose variation we are trying to explain.

    • explanatory variable

      Explanatory variable is a variable we use to explain variation in an outcome variable.

    • as.numeric()

      The as.numeric() function will convert a factorial value into a numeric value. For instance, if you need to change a factor such as `Sex` into numeric values, the as.numeric() function will assign each group a number and convert it from being coded ...