`dataFrame.columns.stat — contingencyTable()`

Description

The contingencyTable() method of the stat object computes a contingency table containing the observed frequencies for the selected categorical columns.

Signature

dataFrame.columns(...columnNames).stat.contingencyTable()

Scope: columns
Family: stat
Returns: table

Argument

...columnNames ( string[] ): The name of the columns from which to compute a contingency table.

Returns

table (array): A two-dimensional table containing the observed frequencies for each category combination, including row and column totals.

Example :

          A1    A2    A3   TOTAL
B1        12     8     5      25
B2         7    14     4      25
B3         3     6    11      20
TOTAL     22    28    20      70

Notes

The method requires exactly two selected columns.
Categories from the first selected column are displayed as columns.
Categories from the second selected column are displayed as rows.
The last column contains row totals.
The last row contains column totals.
The bottom-right cell contains the grand total.
Each cell contains the observed frequency for a category combination.

Example

// compute a contingency table from 2 columns of the dataFrame
var table = dataFrame.columns('groupA', 'groupB').stat.contingencyTable();

// display the contingency table
notebook.output(table);