你的数据里面不单单是e还有其他的缺失值
看我下面的其中的这,就可以看出有多少缺失的表述
tab da056s2,missing
. tab da056s2,missing
Do Activities LM of Played |
Ma-jong/Cards/Chess or Went to |
Community Club | Freq. Percent Cum.
----------------------------------------+-----------------------------------
2 Played Ma-jong, etc, or went to commu | 2,976 16.91 16.91
. | 1,358 7.72 24.63
.d | 12 0.07 24.70
.e | 13,248 75.29 99.99
.r | 2 0.01 100.00
----------------------------------------+-----------------------------------
Total | 17,596 100.00
这些都是缺失值,不参与运算的
你也可以用命令把缺失值转换成其他的,如变成0
mvencode da*,mv(0)
keep ID householdID communityID da056*
des
label list i506 i507
label drop _all
sum
tab da056s1
tab da056s2
tab da056s2,missing
mvencode da*,mv(0)
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