Skip to contents

Count observations in JSON data.

Source: R/verb-count.R
count.Rd

count() groups the data by the given columns and counts the rows in each group. tally() counts rows for the existing grouping set by group_by() without adding new grouping columns. Both build on the group_by()/summarise() machinery and run in the browser.

Usage

# S3 method for class 'tbl_lazy_json'
count(x, ..., wt = NULL, sort = FALSE, name = NULL)

# S3 method for class 'tbl_lazy_json'
tally(x, wt = NULL, sort = FALSE, name = NULL)

Arguments

x

A tbl_lazy_json object.

...

Columns to group by before counting (for count()). Accepts the same inputs as group_by().

wt

Not supported; weighted counts are not implemented for tbl_lazy_json. Supplying a non-NULL value raises an error.

sort

If TRUE, order the result by the count column descending.

name

Name of the count column in the output. NULL uses "n".

Examples

if (FALSE) { # \dontrun{
tbl(session, "mtcars") |> count(cyl)
tbl(session, "mtcars") |> count(cyl, sort = TRUE)
tbl(session, "mtcars") |> group_by(cyl) |> tally()
} # }