Minimum Debug Level  Statement  Meaning</td></tr>

0  Started step number n  Currently working on
nth iteration.

0  Value  Log Likelihood for current parameters.

0  Expected Improvement  The amount by which the
NewtonRaphson method predicts that the next point will be better than
the current one (Assuming that the stepsize is not changed by other
factors). Ignore the sign of this value.

0  Step size  The modulus of the difference
between the current parameters and the next parameters.

2  Producing n threads for computation  The
site likelihoods are computed separately. Computing them in different
threads can improve speed. However, it increases memory usage, and
there are more danger of bugs.

2  Angle between steepest and actual ascent  This is a
normalised dot product rather than an angle. It gives the dot product
between the direction suggested by NewtonRaphson and the direction of
steepest descent. Generally, values close to 1 or 1 indicate circular
contours, which should lead to good convergence. Values close to 0
indicate elongated contours which can indicate illconditioned
parameters. Positive values indicate the program is converging towards
a maximum; negative values indicate it is moving away from a minimum.

2  Modulus  The sum of squares of all current
parameter values. This gives an idea of the largescale movement of
the algorithm.
