Create a TabularDataset to represent tabular data in JSON Lines files (http://jsonlines.org/).

Source: R/datasets.R

Create a TabularDataset to represent tabular data in JSON Lines files (http://jsonlines.org/). ``from_json_lines_files``` creates a Tabular Dataset object , which defines the operations to load data from JSON Lines files into tabular representation. For the data to be accessible by Azure Machine Learning, the JSON Lines files specified by path must be located in a Datastore or behind public web urls. Column data types are read from data types saved in the JSON Lines files. Providing `set_column_types` will override the data type for the specified columns in the returned Tabular Dataset.

create_tabular_dataset_from_json_lines_files(
  path,
  validate = TRUE,
  include_path = FALSE,
  set_column_types = NULL,
  partition_format = NULL
)

Arguments

path

The path to the source files, which can be single value or list of http url string or tuple of Datastore and relative path.
validate

Boolean to validate if data can be loaded from the returned dataset. Defaults to True. Validation requires that the data source is accessible from the current compute.
include_path

Boolean to keep path information as column in the dataset. Defaults to False. This is useful when reading multiple files, and want to know which file a particular record originated from, or to keep useful information in file path.
set_column_types

A named list to set column data type, where key is column name and value is data type.
partition_format

Specify the partition format in path and create string columns from format 'x' and datetime column from format 'x:yyyy/MM/dd/HH/mm/ss', where 'yyyy', 'MM', 'dd', 'HH', 'mm' and 'ss' are used to extrat year, month, day, hour, minute and second for the datetime type. The format should start from the postition of first partition key until the end of file path. For example, given a file path '../USA/2019/01/01/data.csv' and data is partitioned by country and time, we can define '/Country/PartitionDate:yyyy/MM/dd/data.csv' to create columns 'Country' of string type and 'PartitionDate' of datetime type.

Value

The Tabular Dataset object.

See also

data_path