step: Create filtering step

In cohortBuilder: Data Source Agnostic Filtering Tools

Create filtering step

Description

Steps all to perform multiple stages of Source data filtering.

Usage

step(...)

Arguments

...	Filters. See filter.

Value

List of class 'cb_step' storing filters configuration.

Examples

library(magrittr)
iris_step_1 <- step(
  filter('discrete', dataset = 'iris', variable = 'Species', value = 'setosa'),
  filter('discrete', dataset = 'iris', variable = 'Petal.Length', range = c(1.5, 2))
)
iris_step_2 <- step(
  filter('discrete', dataset = 'iris', variable = 'Sepal.Length', range = c(5, 10))
)

# Add step directly to Cohort
iris_source <- set_source(tblist(iris = iris))
coh <- iris_source %>%
  cohort(
    iris_step_1,
    iris_step_2
  ) %>%
  run()

nrow(get_data(coh, step_id = 1)$iris)
nrow(get_data(coh, step_id = 2)$iris)

# Add step to Cohort using add_step method
coh <- iris_source %>%
  cohort()
coh <- coh %>%
  add_step(iris_step_1) %>%
  add_step(iris_step_2) %>%
  run()

cohortBuilder documentation built on Sept. 25, 2024, 5:06 p.m.