dMax              package:desirability              R Documentation

_D_e_s_i_r_a_b_i_l_i_t_y _f_u_n_c_t_i_o_n_s

_D_e_s_c_r_i_p_t_i_o_n:

     Functions implementing multivariate optimization and ranking using
     the desirability function approach described in Derringer and
     Suich (1980)

_U_s_a_g_e:

     ## Default S3 method:
     dMax(low, high, scale = 1, tol = NULL, ...)
     ## Default S3 method:
     dMin(low, high, scale = 1, tol = NULL, ...)
     ## Default S3 method:
     dTarget(low, target, high, lowScale = 1, highScale = 1, tol = NULL, ...) 
     ## Default S3 method:
     dArb(x, d, tol = NULL, ...)
     ## Default S3 method:
     dBox(low, high, tol = NULL, ...)
     ## Default S3 method:
     dOverall(...)

_A_r_g_u_m_e_n_t_s:

     low: a constant to define the desirability function for 'dMax',
          'dMin', 'dTarget' and 'dBox'

    high: a constant to define the desirability function for 'dMax',
          'dMin', 'dTarget' and 'dBox'

  target: a constant to define the desirability function for 'dMax',
          'dMin', 'dTarget' and 'dBox'

   scale: the scaling factor for 'dMax' and 'dMin'. Values less than
          one make the criteria more difficult to satisfy while values
          greater than one make it easier.

lowScale: the scaling factor for 'dTarget'. This bends the curve
          between the points 'low' and 'target'. Values less than one
          make the criteria more difficult to satisfy while values
          greater than one make it easier. 

highScale: the scaling factor for 'dTarget'. This bends the curve
          between the points 'high' and 'target'. Values less than one
          make the criteria more difficult to satisfy while values
          greater than one make it easier.

       x: a set of input values

       d: a set of desirabilites between zero and one (inclusive) that
          match the length of 'x'

     tol: an optional tolerance for zero desirability. When this is
          non-null, zero desirabilites are replaced with this value

     ...: For 'dOverall', this is one or more desirability objects. For
          the other methods, this argument is not currently used

_D_e_t_a_i_l_s:

     The functions  'dMax', 'dMin', 'dTarget' ande 'dOverall' are the
     basic equations used by Derringer and Suich (1980). 'dBox' is a
     simple step funciton between two points. 'dArb' can be used to
     create other shapes that do not fall into the other funcional
     forms. See the package vignette or the references for more details

_V_a_l_u_e:

     a list. Common values are:

    tol : the value specified by the 'tol' argument

   call : the origianl function call

_A_u_t_h_o_r(_s):

     Max Kuhn

_R_e_f_e_r_e_n_c_e_s:

     Derringer, G. and Suich, R. (1980), Simultaneous Optimization of
     Several Response Variables. {\em Journal of Quality Technology}
     {\bf 12}, 214-219.

_S_e_e _A_l_s_o:

     'predict.dMax'

_E_x_a_m_p_l_e_s:

     dMax.default(1,3)
     dMax(1,3)

