File

Introduction

The file connector allows to manage data stored as .csv files.
The high-level functions are:

• load_data()
• save_data()

The following parameters are mandatory:

• path: either explicit value or through the "R_IKER_PATH" environment variable.
• file: the file name (including .csv extension).

Optional parameter:

• resource: used as a sub-folder relative to path. This is useful when the environment variable is defined as a path to the application data, but each date types (i.e. each resource) is stored in a specific folder.
• delim: to set a delimiter that is different from “,”.

Read data

Specific parameter dedicated to reading the data:

• col_types

See read_data() for more details.

Write data

Specific parameter dedicated to writing the data:

• x: the data itself, as a data.frame object.

Because of the nature of the storage, the full dataset has to be passed.
See write_data() for more details.

List

The high-level functions are smart enough to understand parameters passed as a list.

For example:

load_data(path = getwd(), file = "test.csv")

Is equivalent to:

load_data(connector = list(path = getwd(), file = "test.csv"))

This is useful when several connectors may be used in the same app or when the connector values are stored as a list-like object (a YAML file for example).