In marcpaterno/h5tables: Reading Tabular Data from HDF5

knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>"
)
library(h5tables)
root <- rprojroot::is_r_package

The h5tables packages provides functions to read tibbles from tabular HDF5 files.

A tabular HDF5 file is one that contains, at the top-level, on Groups, and in which each Group contains only Datasets. Within each Group, each Dataset is of the same length. Thus each Group represents a table, and each Dataset a column in a table.

Discovering what is in a file

To list all the tables in a tabular HDF5 file, use h5tables::table_names:

names <-table_names(root$find_file("inst/extdata/cms_two_events.h5"))
names

Reading tables

Tables can be read whole (all columns, all rows), or by selecting the names of columns (some columns, all rows).

marcpaterno/h5tables documentation built on July 20, 2020, 11:14 p.m.