StcsvToSchema: Build an object of class StfwfSchema from a csv file.

In david-salgado/fastReadfwf: Fast read of fwf files with arbitrary input schema

Description

StcsvToSchema is a constructor of the class StfwfSchema.

This constructor reads a csv file containing partially or totally the schema of the fixed-width file to read. So far, only English names are supported. This file must contain the following columns:

• variable: the name of the variable.

• width: the number of positions which the values of each variable occupies in the file.

• initialPos: initial position of the field which the values of this variable occupies in the file.

• finalPos: final position of the field which the values of this variable occupies in the file.

• type: type of the variable. It must be either log, int, num or char.

• valueRegEx: regular expression (regex) for the values of each variable.

• description: textual description of the variable.

The file may have a header or not. In the latter case, the order of columns is assumed to be that of the list above. English only is supported so far.

Usage

StcsvToSchema(csvname, sep = ";", header = TRUE, lang = "en", ...)

Arguments

csvname	Name of the csv file containing the schema.
sep	The separator between columns. Defaults to ';'.
header	Does the first data line contain column names? Defaults to TRUE.
lang	Character vector of length 1 indicating the language for the header in the csv file (English: en – default). So far only English is supported.
...	Extra arguments for fread.

Value

Return an object of class StfwfSchema.

Examples

path <- system.file('extdata', package = 'fastReadfwf')
StcsvToSchema(file.path(path, 'SchemaSNHS_microdataWeb.csv'), header = TRUE)

david-salgado/fastReadfwf documentation built on Dec. 25, 2021, 12:43 p.m.