subset_waves: Subset all surveys in a wave
In retroharmonize: Ex Post Survey Data Harmonization

Description Usage Arguments Details Value Examples

The function harmonizes the variable names of surveys (of class survey) that are imported from an external file as a wave with with read_surveys.

1	subset_waves(waves, subset_names = NULL)

`waves`	A list of surveys imported with `read_surveys`.
`subset_names`	The names of the variables that should be kept from all surveys in the list that contains the wave of surveys. Defaults to `NULL` in which case it returns all variables without subsetting.

It is likely that you want to harmonize the variable names with harmonize_var_names first.

The list of surveys with harmonized variable names.

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 <- metadata_waves_create(example_surveys)

metadata$var_name_suggested <- label_normalize(metadata$var_name)

metadata$var_name_suggested[metadata$label_orig == "age education"] <- "age_education"

hnw <- harmonize_var_names(waves = example_surveys, 
                           metadata = metadata )
                           
subset_waves (hnw, subset_names = c("uniqid", "w1", "age_education"))