SCALE_LEVELS function

Scale Levels

Scale Levels of Study Data according to Stevens's Typology

In the metadata, the following entries are allowed for the variable attribute SCALE_LEVEL : data

Format

An object of class list of length 5.

SCALE_LEVELS

Details

• nominal for categorical variables
• ordinal for ordinal variables (i.e., comparison of values is possible)
• interval for interval scales, i.e., distances are meaningful
• ratio for ratio scales, i.e., ratios are meaningful
• na for variables, that contain e.g. unstructured texts, json, xml, ... to distinguish them from variables, that still need to have the SCALE_LEVEL estimated by prep_scalelevel_from_data_and_metadata()

Examples

• sex, eye color -- nominal
• income group, education level -- ordinal
• temperature in degree Celsius -- interval
• body weight, temperature in Kelvin -- ratio

See Also

Wikipedia