Hi all,
I have a question about
and
So what is the difference between these two?
Best,
Jack LiangWang
I have a question about
Code:
<"."
Code:
!="."
Best,
Jack LiangWang
. di ("a" < ".") 0 . di ("a" != ".") 1
if x <.
if x !=.
sysuse auto, clear replace rep78 = .a in 5 //extended missing tab rep78, missing Repair | Record 1978 | Freq. Percent Cum. ------------+----------------------------------- 1 | 2 2.70 2.70 2 | 8 10.81 13.51 3 | 30 40.54 54.05 4 | 17 22.97 77.03 5 | 11 14.86 91.89 . | 5 6.76 98.65 .a | 1 1.35 100.00 ------------+----------------------------------- Total | 74 100.00 tab rep78 if rep78<., missing Repair | Record 1978 | Freq. Percent Cum. ------------+----------------------------------- 1 | 2 2.94 2.94 2 | 8 11.76 14.71 3 | 30 44.12 58.82 4 | 17 25.00 83.82 5 | 11 16.18 100.00 ------------+----------------------------------- Total | 68 100.00 . tab rep78 if rep78!=., missing Repair | Record 1978 | Freq. Percent Cum. ------------+----------------------------------- 1 | 2 2.90 2.90 2 | 8 11.59 14.49 3 | 30 43.48 57.97 4 | 17 24.64 82.61 5 | 11 15.94 98.55 .a | 1 1.45 100.00 ------------+----------------------------------- Total | 69 100.00
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