.
unit 0 cycles 0 op_setting1 0 op_setting2 0 op_setting3 0 s1 0 s2 0 s3 0 s4 0 s5 0 s6 0 s7 0 s8 0 s9 0 s10 0 s11 0 s12 0 s13 0 s14 0 s15 0 s16 0 s17 0 s18 0 s19 0 s20 0 s21 0 dtype: int64 test.head() test.tail() RUL contains the true values for remaining useful life to which we are going to compare