Updated to described new consolidated min_max_value fitness function.

docs/source/user_libs_opt_taguchi.rst

@@ -107,7 +107,7 @@ The bowtie design features three vertical slots (y-direction) in each arm of the
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-The first part of the input file (lines 1-7) contains the parameters to optimise, their initial ranges, and fitness function information for the optimisation process. Three parameters representing the resistor values are defined with ranges between 0.1 :math:`\Omega` and 1 :math:`k\Omega`. A pre-built fitness function called ``maxabsvalue`` is specified with a stopping criterion of 10V/m. The output point in the model that will be used in the optimisation is specified as having the name ``Ex60mm``.
+The first part of the input file (lines 1-7) contains the parameters to optimise, their initial ranges, and fitness function information for the optimisation process. Three parameters representing the resistor values are defined with ranges between 0.1 :math:`\Omega` and 1 :math:`k\Omega`. A pre-built fitness function called ``min_max_value`` is specified with a stopping criterion of 10V/m. Arguments for the ``min_max_value`` function are ``type`` given as ``absmax``, i.e. the maximum absolute values, and the output point in the model that will be used in the optimisation is specified as having the name ``Ex60mm``.
 
 The next part of the input file (lines 9-93) contains the model. For the most part there is nothing special about the way the model is defined - a mixture of Python, NumPy and functional forms of the input commands (available by importing the module ``input_cmd_funcs``) are used. However, it is worth pointing out how the values of the parameters to optimise are accessed. On line 29 a NumPy array of the values of the resistors is created. The values are accessed using their names as keys to the ``optparams`` dictionary. On line 30 the values of the resistors are converted to conductivities, which are used to create new materials (line 34-35). The resistors are then built by applying the materials to cell edges (e.g. lines 55-62). The output point in the model in specifed with the name ``Ex60mm`` and as having only an ``Ex`` field output (line 42).