tidyvpc (version 1.1.0)

stratify: stratify

Description

Stratification for Visual Predictive Check (VPC)

Usage

stratify(o, ...)
# S3 method for tidyvpcobj
stratify(o, formula, data = o$data, ...)

Arguments

o

tidyvpc object

...

Other arguments to include

formula

formula for stratfication

data

Observed data supplied in observed() function

Value

Returns updated tidyvpcobj with stratification formula, stratification column(s), and strat.split datasets which is obs split by unique levels of stratification variable(s). Resulting datasets are of class object data.frame and data.table.

Details

specify stratification variables for VPC using this function

See Also

observed simulated censoring predcorrect binning binless vpcstats

Examples

# NOT RUN {
vpc <- observed(obs_data, x=TIME, y=DV) %>%
    simulated(sim_data, y=DV) %>%
    stratify(~ GENDER) %>%
    binning(NTIME) %>%
    vpcstats()

# Example with 2-way stratification by GENDER and STUDY.

vpc <- vpc %>%
    stratify(~ GENDER + STUDY) %>%
    binning(bin = "centers", centers = c(1,3,5,7,10)) %>%
    vpcstats()

# }