Misra1d               package:NISTnls               R Documentation

_M_o_n_o_m_o_l_e_c_u_l_a_r _A_b_s_o_r_p_t_i_o_n _d_a_t_a

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

     The `Misra1d' data frame has 14 rows and 2 columns. This is the
     same data as `Misra1a' but a different model is fit.

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

       y: A numeric vector of volume values. 

       x: A numeric vector of pressure values. 

_F_o_r_m_a_t:

     This data frame contains the following columns:

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

     These data are the result of a NIST study regarding dental
     research in monomolecular adsorption.  The response variable is
     volume, and the predictor variable is pressure.

_S_o_u_r_c_e:

     Misra, D., NIST (1978).   Dental Research Monomolecular Adsorption
     Study.

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

     data(Misra1d)
     plot(y ~ x, data = Misra1d)
     fm1 <- nls(y ~ b1*b2*x*((1+b2*x)**(-1)), data = Misra1d, trace = TRUE,
                start = c(b1 = 500, b2 = 0.0001) )
     fm2 <- nls(y ~ b1*b2*x*((1+b2*x)**(-1)), data = Misra1d, trace = TRUE,
                start = c(b1 = 450, b2 = 0.0003) )
     fm3 <- nls(y ~ b2*x*((1+b2*x)**(-1)), data = Misra1d, trace = TRUE,
                start = c(b2 = 0.0001), algorithm = "plinear" )
     fm4 <- nls(y ~ b2*x*((1+b2*x)**(-1)), data = Misra1d, trace = TRUE,
                start = c(b2 = 0.0005), algorithm = "plinear" )

