Function reference • teal.transform

Data extract constructors

Functions used to create transform instructions for teal applications.

add_no_selected_choices(): Add empty choice to choices selected

all_choices(): An S3 structure representing the selection of all possible choices in a filter_spec, select_spec or choices_selected object.

check_no_multiple_selection(): Checks that the extract_input specification does not allow multiple selection

choices_labeled() print(<choices_labeled>): Set "<choice>:<label>" type of Names

choices_selected() is.choices_selected(): Choices Selected

data_extract_spec(): Data Extract input for teal modules

filter_spec(): Data extract filter specification

get_extract_datanames(): Gets names of the datasets from a list of data_extract_spec objects

no_selected_as_NULL(): Check select choices for no choice made

select_spec() select_spec.delayed_data() select_spec.default(): Column selection input specification

split_by_sep(): Split by separator

value_choices(): Wrapper on choices_labeled to label variable values basing on other variable values

variable_choices(): Wrapper on choices_labeled to label variables basing on existing labels in data

resolve_delayed(): Resolve delayed inputs by evaluating the code within the provided datasets

Data extract modules

teal modules to generate transform expressions

data_extract_multiple_srv(): Creates a named list of data_extract_srv output

data_extract_ui(): teal data extraction module user-interface

data_extract_srv(): Extraction of the selector(s) details

data_merge_srv(): Data merge module server

data_merge_module(): Data merge module

datanames_input(): Available datasets input

get_dataset_prefixed_col_names(): Returns non-key column names from data

get_anl_relabel_call(): Gets the relabel call

get_merge_call(): Get merge call from a list of selectors

get_relabel_call(): Create relabel call from named character

is_single_dataset(): Checks if the input data_extract_spec objects all come from the same dataset

list_extract_spec(): Make sure that the extract spec has list form

merge_datasets(): Merge the datasets on the keys

Human-readable formatting of a data extract object

format_data_extract(): Formatting data extracts