day_mean_relsd: Calculates the (person level) relative standard deviation of...
In seanchrismurphy/emacalc:

Description Usage Arguments

This is a function that returns a dataframe in which the person-level relative standard deviation of the daily mean of any input variables has been calculated. Output variables will be named 'input_variable_day_mean_relsd'. Note carefully that this is -not- the mean of the relative standard deviations within each day. Rather, the mean at each day is taken, then the relative standard deviation of these means is calculated.

1	day_mean_relsd(data, variables, min, max, person_id, day_id)

`data`	The input dataset
`variables`	A character vector of input variables e.g. c('negemo', 'posemo').
`person_id`	The person level grouping variable - this should be your person id variable.
`day_id`	The day level grouping variable - this should be your day id variable.