List all equations in the text, returning the matched text (e.g., 't(28) = 2.4', 'p = 0.04') and document location in a table. This is the canonical extractor for reported statistics and effect sizes; modules that need statistics should read from this table rather than re-scanning the text.
Value
a data frame with one row per equation and the columns lhs (the statistic name, e.g. "t", "F", "p"), df (parenthetical degrees of freedom such as "(28)" or "(2, 57)", otherwise NA), comp (the comparator, e.g. "="), rhs (the reported value as text), grp_id (groups equations in the same sentence), text_id, and paper_id.
Details
This will catch most comparators like =<>~and most versions of scientific notation like 5.0 x 10^-2 or 5.0e-2. If you find any formats that are not correctly handled by this function, please contact the author.
Examples
paper <- demopaper()
equations <- extract_eq(paper)