Examples of cc.mallet.optimize.InvalidOptimizableException

Exception thrown by optimization algorithms, when the problem is usually due to a problem with the given Maximizable instance.

If the optimizer throws this in your code, usually there are two possible causes: (a) you are computing the gradients approximately, (b) your value function and gradient do not match (this can be checking using @link{edu.umass.cs.mallet.base.maximize.tests.TestMaximizable }. Created: Feb 1, 2006 @author

    slope = MathUtils.rdot( MatrixUtils.length( g ), ArrayUtils.flatten( MatrixUtils.fromMatrix(g) ), 0, 1, ArrayUtils.flatten( MatrixUtils.fromMatrix( line ) ), 0, 1);
    
    logger.debug("slope = " + slope);


    if (slope < 0) {
      throw new InvalidOptimizableException ("Slope = " + slope + " is negative");
    }
    
    if (slope == 0) {
      throw new InvalidOptimizableException ("Slope = " + slope + " is zero");
    }


    // find maximum lambda
    // converge when (delta x) / x < REL_TOLX for all coordinates.
    //  the largest step size that triggers this threshold is

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Examples of cc.mallet.optimize.InvalidOptimizableException

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