///////////////////////////////////////////////////////////////////////////////
// For information as to what this class does, see the Javadoc, below.       //
// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,       //
// 2007, 2008, 2009, 2010, 2014, 2015, 2022 by Peter Spirtes, Richard        //
// Scheines, Joseph Ramsey, and Clark Glymour.                               //
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// it under the terms of the GNU General Public License as published by      //
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package edu.cmu.tetrad.test;

import edu.cmu.tetrad.util.Matrix;
import org.junit.Test;

import static org.junit.Assert.assertEquals;

/**
 * Tests basic functionality of the tetrad.util.Point class.
 *
 * @author josephramsey
 */
public class TestMatrix {

    @Test
    public void test1() {
        Matrix x = new Matrix(4, 0);

        Matrix xT = x.transpose();
        Matrix xTx = xT.times(x);
        Matrix xTxInv = xTx.inverse();

        assertEquals(0, xTx.trace(), 0.01);
        assertEquals(0, xTxInv.trace(), 0.01);
    }
}





