dims: Detailed information about the format of the tables

In TKCat: Tailored Knowledge Catalog

Detailed information about the format of the tables

Description

Detailed information about the format of the tables

Usage

## S3 method for class 'chMDB'
dims(x, ...)

## S3 method for class 'fileMDB'
dims(
  x,
  ...,
  by = 1000,
  estimateThr = 5e+07,
  estimateSample = 10^6,
  showWarnings = TRUE
)

dims(x, ...)

## S3 method for class 'memoMDB'
dims(x, ...)

## S3 method for class 'metaMDB'
dims(x, ...)

Arguments

x	an object with embedded data tables
...	the name of the tables to consider (default: all of them)
by	the size of the batch: number of lines to count together (default: 1000)
estimateThr	file size threshold in bytes from which an estimation of row number should be computed instead of a precise count (default: 50000000 = 50MB)
estimateSample	number of values on which the estimation is based (default: 10^6)
showWarnings	a warning is raised by default if estimation is done.

Value

A tibble with one row for each considered table and the following columns:

• name: the name of the table

• format: "table" or "matrix"

• ncol: number of columns

• nrow: number of rows

• records: number of records (nrow for tables and ncol*nrow for matrices)

• transposed: FALSE by default. TRUE only for matrices stored in a transposed format.

TKCat documentation built on Feb. 16, 2023, 10:51 p.m.