# Functions for Extracting and Merging Data in the 'teal' Framework

## Documentation for package ‘teal.transform’ version 0.5.0

- DESCRIPTION file.
- User guides, package vignettes and other documentation.
- Package NEWS.

## Help Pages

add_no_selected_choices | Add empty choice to choices selected
all_choices | Bare constructor for 'all_choices' object
check_no_multiple_selection | Checks that the 'extract_input' specification does not allow multiple selection
choices_labeled | Set "<choice>:<label>" type of names
choices_selected | Choices selected
compose_and_enable_validators | Function to compose 'validators' from 'data_extract_multiple_srv'
datanames_input | Help text with available datasets input
data_extract_multiple_srv | Creates a named list of 'data_extract_srv' output
data_extract_multiple_srv.FilteredData | Creates a named list of 'data_extract_srv' output
data_extract_multiple_srv.list | Creates a named list of 'data_extract_srv' output
data_extract_multiple_srv.reactive | Creates a named list of 'data_extract_srv' output
data_extract_spec | Data extract input for 'teal' modules
data_extract_srv | Extraction of the selector(s) details
data_extract_srv.FilteredData | Extraction of the selector(s) details
data_extract_srv.list | Extraction of the selector(s) details
data_extract_ui | 'teal' data extraction module user-interface
filter_spec | Data extract filter specification
format_data_extract | Formatting data extracts
get_anl_relabel_call | Gets the relabel call
get_dataset_prefixed_col_names | Returns non-key column names from data
get_extract_datanames | Gets names of the datasets from a list of 'data_extract_spec' objects
get_merge_call | Get merge call from a list of selectors
get_relabel_call | Create relabel call from named character
is.choices_selected | Choices selected
is_single_dataset | Verify uniform dataset source across data extract specification
list_extract_spec | Make sure that the extract specification is in list format
merge_datasets | Merge the datasets on the keys
merge_expression_module | Merge expression module
merge_expression_module.list | Merge expression module
merge_expression_module.reactive | Merge expression module
merge_expression_srv | Data merge module server
merge_expression_srv.list | Data merge module server
merge_expression_srv.reactive | Data merge module server
no_selected_as_NULL | Check select choices for no choice made
print.choices_labeled | Set "<choice>:<label>" type of names
resolve_delayed | Resolve delayed inputs by evaluating the code within the provided datasets
resolve_delayed.FilteredData | Resolve delayed inputs by evaluating the code within the provided datasets
resolve_delayed.list | Resolve delayed inputs by evaluating the code within the provided datasets
select_spec | Column selection input specification
select_spec.default | Column selection input specification
select_spec.delayed_data | Column selection input specification
split_by_sep | Split by separator (matched exactly)
value_choices | Value labeling and filtering based on variable relationship
value_choices.character | Value labeling and filtering based on variable relationship
value_choices.data.frame | Value labeling and filtering based on variable relationship
variable_choices | Variable label extraction and custom selection from data
variable_choices.character | Variable label extraction and custom selection from data
variable_choices.data.frame | Variable label extraction and custom selection from data