Package 'datefixR'

Title: Standardize Dates in Different Formats or with Missing Data
Description: There are many different formats dates are commonly represented with: the order of day, month, or year can differ, different separators ("-", "/", or whitespace) can be used, months can be numerical, names, or abbreviations and year given as two digits or four. 'datefixR' takes dates in all these different formats and converts them to R's built-in date class. If 'datefixR' cannot standardize a date, such as because it is too malformed, then the user is told which date cannot be standardized and the corresponding ID for the row. 'datefixR' also allows the imputation of missing days and months with user-controlled behavior.
Authors: Nathan Constantine-Cooke [aut, cre] , Jonathan Kitt [ctb, trl], Antonio J. Pérez-Luque [ctb, trl] , Daniel Possenriede [ctb, trl] , Michal Lauer [ctb, trl], Kaique dos S. Alves [rev] , Al-Ahmadgaid B. Asaad [rev] , Anatoly Tsyplenkov [ctb, trl] , Chitra M. Saraswati [ctb, trl]
Maintainer: Nathan Constantine-Cooke <[email protected]>
License: GPL (>= 3)
Version: 1.7.0.9000
Built: 2024-12-09 14:22:27 UTC
Source: https://github.com/ropensci/datefixR

Help Index

Example dataset of dates in different formats

Description

A toy dataset to use with datefixR functions.

Usage

exampledates

Format

A data frame with 5 rows and 3 variables:

id

Row ID (numeric).

some.dates

Dates in different formats (character).

some.more.dates

Additional dates in different formats (character).

Shiny application standardizing date data in csv or excel files

Description

A shiny application which allows users to standardize dates using a graphical user interface (GUI). Most features of datefixR are supported including imputing missing date data. Data can be provided as CSV (comma-separated value) or XLSX (Excel) files. Processed datasets can be downloaded as CSV files. Please note, the dependencies for this app (DT, htmltools, readxl, and shiny) are not installed alongside datefixR. This allows datefixR to be installed on secure systems where these packages may not be allowed. If one of these dependencies is not installed on the system when this function is called, then the user will be given the option of installing them.

Usage

fix_date_app(theme = "datefixR")

Arguments

theme

Color theme for shiny app. Either "datefixR" (datefixR colors) or "none"(default shiny app styling).

Value

A shiny app.

See Also

The shiny package.

Examples

## Not run: 
fix_date_app()

## End(Not run)

Convert non-standardized dates to R's Date class

Description

Converts a character vector (or single character object) from inconsistently formatted dates to R's Date class. Supports numerous separators including /, -, or space. Supports numeric, abbreviation or long-hand month notation. Where day of the month has not been supplied, the first day of the month is imputed by default. Either DMY or YMD is assumed by default. However, the US system of MDY is supported via the format argument.

Usage

fix_date_char(
  dates,
  day.impute = 1,
  month.impute = 7,
  format = "dmy",
  excel = FALSE,
  roman.numeral = FALSE
)

Arguments

dates

Character vector to be converted to R's date class.
day.impute

Integer. Day of the month to be imputed if not available. defaults to 1. Maximum value of 31. If day.impute is greater than the number of days for a given month, then the last day of that month will be imputed. If day.impute = NA, then NA will be imputed for the date instead and a warning will be raised. If day.impute = NULL then instead of imputing the day of the month, the function will fail.
month.impute

Integer. Month to be be imputed if not available. Defaults to 7 (July). If month.impute = NA then NA will be imputed for the date instead and a warning will be raised. If month.impute = NULL then instead of imputing the month, the function will fail.
format

Character. The format which a date is mostly likely to be given in. Either "dmy" (default) or "mdy". If year appears to have been given first, then YMD is assumed for the subject (format argument is not used for these observations)
excel

Logical. If a date is given as only numbers (no separators), and is more than four digits, should the date be assumed to be from Excel which counts the number of days from 1900-01-01? In most programming languages (including R), days are instead calculated from 1970-01-01 and this is the default for this function (excel = FALSE)
roman.numeral

[Experimental] Logical. If TRUE, months detected to have been given as Roman numerals will be converted. Months are given in Roman numerals in some database systems and biological records. Defaults to FALSE as this may occasionally interfere with months in other formats.

Value

A vector of elements belonging to R's built in Date class with the following format yyyy-mm-dd.

See Also

fix_date_df which is similar to fix_date_char() except is applicable to columns of a data frame.

Examples

bad.date <- "02 03 2021"
fixed.date <- fix_date_char(bad.date)
fixed.date

Clean up messy date columns

Description

Tidies a dataframe object which has date columns entered via a free-text box (possibly by different users) and are therefore in a non-standardized format. Supports numerous separators including /,-, or space. Supports all-numeric, abbreviation, or long-hand month notation. Where day of the month has not been supplied, the first day of the month is imputed. Either DMY or YMD is assumed by default. However, the US system of MDY is supported via the format argument.

Usage

fix_date_df(
  df,
  col.names,
  day.impute = 1,
  month.impute = 7,
  id = NULL,
  format = "dmy",
  excel = FALSE,
  roman.numeral = FALSE
)

Arguments

df

A dataframe or tibble object with messy date column(s)
col.names

Character vector of names of columns of messy date data
day.impute

Integer. Day of the month to be imputed if not available. defaults to 1. Maximum value of 31. If day.impute is greater than the number of days for a given month, then the last day of that month will be imputed. If day.impute = NA, then NA will be imputed for the date instead and a warning will be raised. If day.impute = NULL then instead of imputing the day of the month, the function will fail.
month.impute

Integer. Month to be be imputed if not available. Defaults to 7 (July). If month.impute = NA then NA will be imputed for the date instead and a warning will be raised. If month.impute = NULL then instead of imputing the month, the function will fail.
id

Name of column containing row IDs. By default, the first column is assumed.
format

Character. The format which a date is mostly likely to be given in. Either "dmy" (default) or "mdy". If year appears to have been given first, then YMD is assumed for the subject (format argument is not used for these observations)
excel

Logical. If a date is given as only numbers (no separators), and is more than four digits, should the date be assumed to be from Excel which counts the number of days from 1900-01-01? In most programming languages (including R), days are instead calculated from 1970-01-01 and this is the default for this function (excel = FALSE)
roman.numeral

[Experimental] Logical. If TRUE, months detected to have been given as Roman numerals will be converted. Months are given in Roman numerals in some database systems and biological records. Defaults to FALSE as this may occasionally interfere with months in other formats.

Value

A dataframe or tibble object. Dependent on the type of df. Selected columns are of type Date with the following format yyyy-mm-dd

See Also

fix_date_char which is similar to fix_date_df() except can only be applied to character vectors.

Examples

data(exampledates)
fixed.df <- fix_date_df(exampledates, c("some.dates", "some.more.dates"))
fixed.df