orings                 package:DAAG                 R Documentation

_C_h_a_l_l_e_n_g_e_r _O-_r_i_n_g_s _D_a_t_a

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

     Record of the number and type of O-ring failures prior to the
     tragic Challenger mission in January, 1986.

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

     orings

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

     This data frame contains the following columns:

     _T_e_m_p_e_r_a_t_u_r_e O-ring temperature for each test firing or actual
          launch of the shuttle rocket engine

     _E_r_o_s_i_o_n Number of erosion incidents 

     _B_l_o_w_b_y Number of blowby incidents

     _T_o_t_a_l Total number of incidents

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

     Presidential Commission on the Space Shuttle Challenger Accident, 
     Vol. 1, 1986: 129-131.

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

     Tufte, E. R. 1997. Visual Explanations. Graphics Press, Cheshire,
     Connecticut, U.S.A.

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

     oldpar <- par(mfrow=c(1,2))
     plot(Total~Temperature, data = orings[c(1,2,4,11,13,18),]) # the 
                    # observations included in the pre-launch charts
     plot(Total~Temperature, data = orings)
     par(oldpar)

