fromarrays

Fromarrays is a function or constructor used in several data-processing libraries to construct a tabular data structure from a collection of one-dimensional arrays, with each array representing a column. The typical purpose is to assemble disparate sequences into a cohesive, table-like object that can be handled by data analysis tools.

Common usage involves providing a sequence of arrays of equal length along with an optional list of column names or a schema. The function then returns a table-like object, such as a DataFrame, a table, or a record batch, where the number of rows equals the length of the input arrays and the number of columns equals the number of arrays. Depending on the library, the function may also perform automatic dtype inference or allow explicit type declarations for each column. Handling of missing values is often supported, depending on the underlying data structures.

In practice, fromarrays is used to quickly assemble data from separate sources, especially when data are already organized as parallel arrays. For example, two arrays representing ids and labels can be combined into a single structured object for subsequent analysis or export. The exact behavior and available options can vary by library, including how it handles length mismatches, nulls, or nested data.

Limitations and considerations include the requirement that input arrays share the same length, potential memory usage with large datasets, and the need to choose appropriate column names and data types. Some environments offer variants or synonyms (such as from_arrays or equivalent constructors) that perform the same core operation but with library-specific conventions.

See also: from_records, DataFrame, RecordBatch, Table.