hail_read_matrix: Read a MatrixTable
In r-spark/sparkhail: A 'Sparklyr' Extension for 'Hail'

Read and create a MatrixTable object, it is necessary to convert the data in dataframe using hail_dataframe.

1	hail_read_matrix(hl, path)

`hl`	A hail context object. Create one using `hail_context()`.
`path`	A string with the path to MatrixTable folder

A hail MatrixTable is a standard data structure in hail framework. A MatrixTable consists of four components:

a two-dimensional matrix of entry fields where each entry is indexed by row key(s) and column key(s)
a corresponding rows table that stores all of the row fields that are constant for every column in the dataset
a corresponding columns table that stores all of the column fields that are constant for every row in the dataset
a set of global fields that are constant for every entry in the dataset

You can see the MatrixTable structure using hail_describe.

hail_matrix_table

r-spark/sparkhail documentation built on Jan. 23, 2020, 2:28 p.m.