stratify | R Documentation |
Use to specify stratification variables for VPC.
stratify(o, ...)
## S3 method for class 'tidyvpcobj'
stratify(o, formula, data = o$data, ...)
o |
A |
... |
Other arguments to include. |
formula |
Formula for stratification. |
data |
Observed data supplied in |
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
.
observed
simulated
censoring
predcorrect
binning
binless
vpcstats
require(magrittr)
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()
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