convert_data: Convert Data

In poissonconsulting/datalist: Numericise, centre, standardise and generate new data sets

Description

Convert (by numericising, centring or standardising) the variables of a data.frame or elements of a list into a list of integer or numeric values ready for analysis by JAGS, OpenBUGS or WinBUGS.

Usage

convert_data(data, numericise = TRUE, centre = FALSE, standardise = FALSE,
  dat = NULL)

Arguments

data	the data frame or list of data on which the conversion is based
numericise	a logical scalar or a character vector of the variables to numericise
centre	a logical scalar or a character vector of the variables to centre
standardise	a logical scalar or a character vector of the variables to standardise
dat	the data frame or data list to convert. If dat is NULL the dataset passed as the data argument is converted

Details

Numericising, centring and standardising represent increasing conversion of a variable. A variable is first converted into a numeric value (numericising). Next the mean is subtracted from all the values (centring). Finally all the values are divided by the standard deviation (standardising).

Numericising has no effect on numeric and integer values. Factors are numericized by converting to an integer. Date and POSIXt variables are numericised by converting to integer values and subtracting the integer value of 1999-12-31 or 1999-12-31 23:59:59 UTC, respectively.

Centring has no affect on factors while integer, Date and POSIXt values are subtracted from the rounded mean. Similarly, standardising has no affect on factors while centred integer, Date and POSIXt values are divided by their respective standard deviation.

Value

The converted data frame

Examples

data <- data.frame(numeric = 1:10 + 0.1, integer = 1:10, 
factor = factor(1:10), date = as.Date("2000-01-01") + 1:10,
posixt = ISOdate(2000,1,1) + 1:10)
convert_data(data)
convert_data(data, centre = TRUE)
convert_data(data, standardise = TRUE)
convert_data(data, numericise = FALSE, standardise = "date")
convert_data(data, numericise = FALSE, centre = "date", standardise = "date")

poissonconsulting/datalist documentation built on Feb. 18, 2021, 10:24 p.m.