lookup_recode: Lookup table switch handler

In epidm: UK Epidemiological Data Management

Lookup table switch handler

Description

A function to call an epidm lookup table and recode where we are aware of a new value.

Built in are the organism re-classifications and specimen_type groupings and a manual mode.

Usage

lookup_recode(src, type = c("species", "specimen", "manual"), .import = NULL)

Arguments

src	a character, vector or column containing the value(s) to be referenced
type	a character value to denote the lookup table used
.import	a list in the order list(new,old) containing the values for another lookup table existing in the environment

Value

a list object of the recoded field

Examples

df <- data.frame(
  spec = c(
    sample(grep(")",
                respeciate_organism$previous_organism_name,
                value=TRUE,
                invert = TRUE),
           9),
    "ESCHERICHIA COLI","SARS-COV-2","CANDIDA AUREUS"),
  type = sample(specimen_type_grouping$specimen_type,12),
  date = sample(seq.Date(from = Sys.Date()-365,
                         to = Sys.Date(),
                         by = "day"),12)
)
df <- df[order(df$date),]

# show the data before the changes
df

# check the lookup tables
# observe the changes
head(respeciate_organism[1:2])
df$species <- lookup_recode(df$spec,'species')
df[,c('spec','species','date')]

head(specimen_type_grouping)
df$grp <- lookup_recode(df$type,'specimen')
df[,c('species','type','grp','date')]

# for a tidyverse use
# df %>% mutate(spec=lookup_recode(spec,'species))

# manual input of your own lookup
# .import=list(new,old)
lookup_recode(
  "ALCALIGENES DENITRIFICANS",
  type = 'manual',
  .import=list(respeciate_organism$organism_species_name,
               respeciate_organism$previous_organism_name)
  )

epidm documentation built on July 12, 2022, 1:07 a.m.