row_counts: Build an optree pipeline counts rows.
In WinVector/rquery: Relational Query Generator for Data Manipulation at Scale

row_counts

R Documentation

Build an optree pipeline counts rows.

Description

This is an example of building up a desired pre-prepared pipeline fragment from relop nodes.

Usage

row_counts(source, ..., groupby = character(0), env = parent.frame())

Arguments

`source`	relop tree or data.frame source.
`...`	force later arguments to bind by name.
`groupby`	partitioning (window function) column names.
`env`	environment to look for values in.

Examples


# by hand logistic regression example
d <- mk_td("survey_table",
           c("subjectID", "surveyCategory", "assessmentTotal"))
optree <- d %.>%
  row_counts(., groupby = "subjectID")
cat(format(optree))

WinVector/rquery documentation built on Aug. 24, 2023, 11:12 a.m.