R/04-catalogue_functions.R
as_valueType.RdAttributes a valueType to an object, that can be a vector, or in a data frame using dplyr::mutate.
as_valueType(x, valueType = "text")Object to be coerced. Can be a vector.
A character string of the valueType used to coerce x.
The object coerced accordingly to the input valueType.
The valueType is a declared property of a variable that is required in certain functions to determine handling of the variables. Specifically, valueType refers to the OBiBa data type of a variable. The valueType is specified in a data dictionary in a column 'valueType' and can be associated with variables as attributes. Acceptable valueTypes include 'text', 'integer', 'decimal', 'boolean', datetime', 'date'. The full list of OBiBa valueType possibilities and their correspondence with R data types are available using valueType_list. The valueType can be used to coerce the variable to the corresponding data type.
{
# use madshapR_DEMO provided by the package
dataset <- madshapR_DEMO$dataset_TOKYO
as_valueType(head(dataset$dob),'date')
# as_valueType is compatible with tidyverse philosophy
library(dplyr)
mtcars %>% mutate(cyl = as_valueType(cyl,'integer')) %>% head()
}
#> mpg cyl disp hp drat wt qsec vs am gear carb
#> Mazda RX4 21.0 6 160 110 3.90 2.620 16.46 0 1 4 4
#> Mazda RX4 Wag 21.0 6 160 110 3.90 2.875 17.02 0 1 4 4
#> Datsun 710 22.8 4 108 93 3.85 2.320 18.61 1 1 4 1
#> Hornet 4 Drive 21.4 6 258 110 3.08 3.215 19.44 1 0 3 1
#> Hornet Sportabout 18.7 8 360 175 3.15 3.440 17.02 0 0 3 2
#> Valiant 18.1 6 225 105 2.76 3.460 20.22 1 0 3 1