src/ports/postgres/modules/stats/test/anova_test.ic.sql_in

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 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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 *//* ----------------------------------------------------------------------- */

/* -----------------------------------------------------------------------------
 * Test ANOVA.
 *
 * Example taken from:
 * http://www.itl.nist.gov/div898/handbook/prc/section4/prc433.htm
 * -------------------------------------------------------------------------- */

CREATE TABLE nist_anova_test (
    id SERIAL,
    resistance FLOAT8[]
);

COPY nist_anova_test(resistance) FROM stdin;
{6.9,8.3,8.0}
{5.4,6.8,10.5}
{5.8,7.8,8.1}
{4.6,9.2,6.9}
{4.0,6.5,9.3}
\.

CREATE TABLE one_way_anova_nist AS
SELECT (one_way_anova(level, value)).* FROM (
    SELECT level, resistance[level] AS value
    FROM
        nist_anova_test, (
        SELECT * FROM generate_series(1,3) level
    ) q
) q;