read;nvar=43;nobs=2240;file=D:\old_drive_d\new_laptop\CE697M\pavement-pds.txt$
histogram;rhs=x4$
dstat;rhs=x4$
create;if(x4=1)xx4=0$
create;if(x4=2)xx4=1$
create;if(x4=3)xx4=2$
create;if(x4=4)xx4=3$
create;if(x4=5)xx4=4$
reject;x4=-999$
ordered;lhs=xx4;rhs=one,x9,x16,x27,x28
;pds=x3;margin$