linlogitf               package:drfit               R Documentation

_L_i_n_e_a_r-_l_o_g_i_s_t_i_c _f_u_n_c_t_i_o_n

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

     Helper function describing a special type of dose-response curves,
     showing a stimulus at subtoxic doses.

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

       linlogitf(x,k,f,mu,b)

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

       x: In this context, the x variable is the dose.

       k: In the drfit functions, k is set to 1.

       f: One of the parameters describing the curve shape.

      mu: The parameter describing the location of the curve (log
          EC50).

       b: One of the parameters describing the curve shape.

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

     The response at dose x.

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

     Johannes Ranke  jranke@uni-bremen.de  <URL:
     http://www.uft.uni-bremen.de/chemie/ranke>

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

     van Ewijk, P. H. and Hoekstra, J. A. (1993) _Ecotox Environ
     Safety_ *25* 25-32

