Module dataframes 

Data frame manipulation builtins — merge, subset, transform, with.

These builtins operate on data frames (lists with class “data.frame”). subset, transform, and with are pre-eval builtins because they need to evaluate expressions in the context of a data frame’s columns. split() is in interp.rs since it already existed there.

Statics

__BUILTIN_REG_BUILTIN_MERGE 🔒

__PRE_EVAL_REG_PRE_EVAL_SUBSET 🔒

__PRE_EVAL_REG_PRE_EVAL_TRANSFORM 🔒

__PRE_EVAL_REG_PRE_EVAL_WITH 🔒

Functions

build_data_frame 🔒

Build a data frame from columns with automatic row names.

builtin_merge 🔒

Merge two data frames by common columns (SQL-style join).

coerce_to_string_vec 🔒

Coerce an RValue to a character vector of column names.

df_col_index 🔒

Find a column by name in a data frame, returning its index.

df_col_names 🔒

Extract a data frame’s column names from its “names” attribute.

df_nrow 🔒

Get the number of rows in a data frame.

df_to_env 🔒

Create a child environment with data frame columns as bindings.

pre_eval_subset 🔒

Subset a data frame by condition and/or column selection.

pre_eval_transform 🔒

Add or modify columns in a data frame.

pre_eval_with 🔒

Evaluate an expression in the context of a data frame.

resolve_column_selection 🔒

Resolve a column selection expression to column indices.

select_rows_from_column 🔒

Select rows from a column vector based on match pairs.

subset_rvalue_by_mask 🔒

Subset an RValue column by a boolean mask.

subset_vector_by_mask 🔒

Subset a vector by a boolean mask (true = keep, false/NA = drop).

subset_vector_impl 🔒

Subset a plain vector by a logical condition.