Blurb::
Characteristic values to scale continuous design variables

Description::
Each real value in \c scales is a nonzero characteristic value to be
used in scaling each continuous design variable. They only have effect
when the associated method specifies \c scaling.

This keyword is required for \ref
variables-continuous_design-scale_types of <tt>'value'</tt> and
optional for <tt>'auto'</tt> and <tt>'log'</tt>. When specified in
conjunction with log, scale values are applied prior to the logarithm,
to permit log scaling of strictly negative design variables.

If a single real value is specified it will apply to all continuous
design variables. Otherwise, a scale value must be specified for each
continuous design variable.

<b>Usage Tips:</b>

When \c scales are specified, but not \ref
variables-continuous_design-scale_types, the scaling type is assumed
to be 'value' for all continuous design variables.

Use scale values of 1.0 to selectively avoid scaling a subset of
the variables.

Scaling for linear constraints is applied \e after any continuous
variable scaling.

See the scaling information under specific methods, e.g.,
\c method-*-scaling for details on how to use this keyword.


Topics::	
Examples:: 
Two continuous design variables, one scaled by the characteristic value 4.0, the other log-scaled without additional value scaling
\verbatim
  continuous_design = 2
    initial_point    -1.2      1.0
    lower_bounds     -200      0.001
    upper_bounds      200      2.0
    descriptors       'x1'     "x2"
    scale_types = 'value' 'log'
    scales = 4.0 1.0
\endverbatim

Theory::
Faq::
See_Also::	

