optimization_variable

• type: setup command.
• function: defines a parameter of an element to be used in optimization.
• N.B.: It is not possible to optimize an element if the element name starts with one of the following characters: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, ., +, or -. The reason is that elegant will attempt to make an SDDS parameter name containing the element name, and these characters are disallowed at the beginning of such a name.

&optimization_variable
    STRING name = NULL;
    STRING item = NULL;
    double lower_limit = 0;
    double upper_limit = 0;
    double step_size = 1;
    long disable = 0;
    long force_inside = 0;
&end

• name -- The name of the element.
• item -- The parameter of the element to be varied.
• lower_limit, upper_limit -- The lower and upper limits allowed for the parameter. If these are equal, the range of the parameter is unlimited.
• step_size -- The initial step size (``simplex'' optimization ) or the grid size in this dimension (``grid'' or ``sample'' optimization).
• disable -- If nonzero, the covariable is ignored.
• force_inside -- If nonzero, the initial value is forced inside the allowed range defined by the lower_limit and upper_limit parameters.