hird parameter in the call to <a
 href="../util/minimize.m">minimize</a> limits the number of function
evaluations to a maximum of 100. The inferred noise standard deviation is
<tt>exp(hyp2.lik)=0.15</tt>, somewhat larger than the one used to
generate the data (0.1). The final negative log marginal likelihood is
<tt>nlml2=14.13</tt>, showing that the joint probability (density) of
the training data is about <tt>exp(14.13-11.97)=8.7</tt> times smaller
than for the setup actually generating the data. Finally,