. use "C:\Stata12\data\02-sap.dta", clear
. list id-pre in 1/10
+------------------------------------------------------------+
|
id sex
age
ldh
cr abl
mods
pre |
|------------------------------------------------------------|
1. | 828966
0
65 299.3
47.1 34.4
1
.0614 |
2. | 769948
1
40 2036
395.1 25.9
1 .99972
|
3. | 691896
1
78
881 89.4
39.1
1 .17659 |
4. | 679641
1
79 2250
360.2 26.2
1 .99972
|
5. | 766834
1
79
300 775
22.4
1 .99995 |
|------------------------------------------------------------|
6. | 746872
1
76
410 177
21.1
1 .86829 |
7. | 711428
1
58 2047.4
276 27.1
1 .99814
|
8. | 699401
0
62
633 235.4
24.7 1
.93165 |
9. | 789971
0
79
225
71 30.2
1
.1432 |
10. | 788979
1 21
1149
37
21
1 .85097 |
+------------------------------------------------------------+
. gen age_g="0"
. replace age_g="青年组" if
age<40
age_g was str1 now str6
(21 real changes made)
. replace age_g="老年组" if
age>60
(58 real changes made)
. replace age_g="中年组" if
age<=60&age>=40
(34 real changes made)
. list id- age_g in 1/10
+---------------------------------------------------------------------+
|
id sex
age
ldh
cr abl
mods
pre age_g
|
|---------------------------------------------------------------------|
1. | 828966
0
65 299.3
47.1 34.4
1
.0614 老年组
|
2. | 769948
1
40 2036
395.1 25.9
1 .99972
中年组 |
3. | 691896
1
78
881 89.4
39.1
1 .17659
老年组 |
4. | 679641
1
79 2250
360.2 26.2
1 .99972
老年组 |
5. | 766834
1
79
300 775
22.4
1 .99995
老年组 |
|---------------------------------------------------------------------|
6. | 746872
1
76
410 177
21.1
1 .86829
老年组 |
7. | 711428
1
58 2047.4
276 27.1
1 .99814
中年组 |
8. | 699401
0
62
633 235.4
24.7 1
.93165 老年组 |
9. | 789971
0
79
225
71 30.2
1
.1432 老年组 |
10. | 788979
1 21
1149
37
21
1 .85097
青年组 |
+---------------------------------------------------------------------+
. egen ldh1m=mean(ldh) if age_g=="青年组"
(92 missing values generated)
. egen ldh2m=mean(ldh) if age_g=="中年组"
(79 missing values generated)
. egen ldh3m=mean(ldh) if age_g=="老年组"
(55 missing values generated)
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