我使用CGSS2003的数据,想生成一个重点大学的人数的变量,没有直接的测量,只有每一个阶段的大学的性质,所以要一个个加起来,具体过程如下:recode slevel01(1 2 3=1),gen(college01),重复此指令到recode slevel07(1 2 3=1),gen(college07),gen college=(college01+college02+college03+college04+college05+college06+college07),结果却出现(5754 missing values generated)
tab college
no observations
tab college01
college01 | Freq. Percent Cum.
------------+-----------------------------------
1 | 36 100.00 100.00
------------+-----------------------------------
Total | 36 100.00
. tab college02
college02 | Freq. Percent Cum.
------------+-----------------------------------
1 | 88 100.00 100.00
------------+-----------------------------------
Total | 88 100.00
. tab college03
college03 | Freq. Percent Cum.
------------+-----------------------------------
1 | 543 100.00 100.00
------------+-----------------------------------
Total | 543 100.00
. tab college04
college04 | Freq. Percent Cum.
------------+-----------------------------------
1 | 115 100.00 100.00
------------+-----------------------------------
Total | 115 100.00
. tab college05
college05 | Freq. Percent Cum.
------------+-----------------------------------
1 | 23 100.00 100.00
------------+-----------------------------------
Total | 23 100.00
. tab college06
college06 | Freq. Percent Cum.
------------+-----------------------------------
1 | 3 100.00 100.00
------------+-----------------------------------
Total | 3 100.00
. tab college07
college07 | Freq. Percent Cum.
------------+-----------------------------------
1 | 1 100.00 100.00
------------+-----------------------------------
Total | 1 100.00
需要虫子的菜鸟,求诸位帮帮忙,给我点营养哈~~~~