getlet               package:ProfessR               R Documentation

_G_e_t _L_e_t_t_e_r _G_r_a_d_e_s

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

     Get letter grades from list of numeric scores

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

     getlet(ggrades, divs)

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

 ggrades: vector of grades

    divs: numerical vector of divisions

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

     Returns letter grades scaled linearly between divisions.

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

     LIST: 

 ggrades: Input grades

    lett: letter values

    scor: scores after scaling

    divs: divisions used in setting scores

    LETS: Letters for grades

    SCRS: numeric divisions used for LETS

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

     Jonathan M. Lees<jonathan.lees@unc.edu>

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

     do.grades

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

     g = rnorm(130, m=82, sd=10)

     g[g>100] = 100
     g[g<1] = 1


     B = boxplot(g)

     divs = c(min(g), B$stats[1:4] + diff(B$stats)/2, max(g) )

     G = getlet(g, divs)

     cbind(G$LETS, G$SCRS)


     data.frame(G$grades, G$lett, G$scor)

