harmonize_waves: Harmonize waves
In retroharmonize: Ex Post Survey Data Harmonization

Description Usage Arguments Details Value See Also Examples

Harmonize the values of surveys.

1	harmonize_waves(waves, .f, status_message = FALSE)

`waves`	A list of surveys
`.f`	A function to apply for the harmonization.
`status_message`	Defaults to `FALSE`. If set to `TRUE` it shows the id of the survey that is being joined.

The functions binds together variables that are all present in the surveys, and applies a harmonization function .f on them.

A natural full join of all surveys in a single data frame.

Other variable label harmonization functions: harmonize_values(), label_normalize(), na_range_to_values()

examples_dir <- system.file("examples", package = "retroharmonize")
survey_list <- dir(examples_dir)[grepl("\\.rds", dir(examples_dir))]

example_surveys <- read_surveys(
  file.path( examples_dir, survey_list), 
  save_to_rds = FALSE)

metadata <- lapply ( X = example_surveys, FUN = metadata_create )
metadata <- do.call(rbind, metadata)

to_harmonize <- metadata %>%
  dplyr::filter ( var_name_orig %in% 
                  c("rowid", "w1") |
                  grepl("trust ", label_orig ) ) %>%
  dplyr::mutate ( var_label = var_label_normalize(label_orig)) %>%
  dplyr::mutate ( var_name = val_label_normalize(var_label))

harmonize_eb_trust <- function(x) {
  label_list <- list(
    from = c("^tend\\snot", "^cannot", "^tend\\sto", "^can\\srely",
             "^dk", "^inap", "na"), 
   to = c("not_trust", "not_trust", "trust", "trust",
           "do_not_know", "inap", "inap"), 
    numeric_values = c(0,0,1,1, 99997,99999,99999)
  )
  
  harmonize_values(x, 
                   harmonize_labels = label_list, 
                   na_values = c("do_not_know"=99997,
                                 "declined"=99998,
                                 "inap"=99999)
                   )
}

merged_surveys <- merge_waves ( example_surveys, var_harmonization = to_harmonize  )

harmonized <- harmonize_waves(waves = merged_surveys, 
                              .f = harmonize_eb_trust,
                              status_message = FALSE)
                              
# For details see Afrobarometer and Eurobarometer Case Study vignettes.