After I run the code, I found that there is a format shift in Jorgensen and Robinson, while the other data does not have such problem. May I know the reason why? Thank you.   DATA grades; input Name &$9. Gender: $1. Section: $3. ExamGrade1 @@; Datalines; Jones       F Mon   39    Jorgensen   M Mon 63 Judson     F Fri      89    Kuhn           F  Mon 89 LeBlanc    F Fri      70    Lee             M Fri    48 Litowski    M Fri     85    Malloy         M Wed 79 Meyer       F Fri     85    Nichols        M Mon 58 Oliver       F Mon   41    Park            F Mon  77 Patel        M Wed  73    Randleman F Wed  46 Robinson M Fri     64    Shien           M Wed 55 Simonson M Wed 62    Smith N       M Wed 71 Smith R    M Mon  79    Sullivan       M Fri    77 ;   ... View more