head

The head method returns a table with a specific number of rows from the beginning of the source table.

Syntax

table.head(number_of_rows)

Parameters

Parameter	Type	Description
number_of_rows	long	The number of rows to return.

Returns

A new table with a specific number of rows from the beginning of the source table.

Examples

The following example filters the table to the first two rows.

from deephaven import new_table
from deephaven.column import string_col, int_col, double_col
from deephaven.constants import NULL_INT

source = new_table([
    string_col("Letter", ["A", "C", "F", "B", "E", "D", "A"]),
    int_col("Number", [NULL_INT, 2, 1, NULL_INT, 4, 5, 3]),
    string_col("Color", ["red", "blue", "orange", "purple", "yellow", "pink", "blue"]),
    int_col("Code", [12, 14, 11, NULL_INT, 16, 14, NULL_INT]),
])


result = source.head(2)

source

result

Related documentation

• Create a new table
• How to use filters
• head_pct
• tail
• tail_pct
• Javadoc
• Pydoc