程序如下：
Mplus VERSION 7.4
MUTHEN & MUTHEN
12/12/2017   7:19 PM

INPUT INSTRUCTIONS

  TITLE:
  Intercept-only model.
  DATA:
  FILE IS C:\Users\长中big渣\Desktop\数据数据\1212.txt;
  VARIABLE:
  NAMES = id gender age edu marri poli Gtype
  Gsize Jage Gage time1 time2 Gpost Upost
  act b c1-c5 d1-d2 d5-d7 e1-e3 e4-e7 f1-f4;
  Missing are all(-9999);
  USEVARIABLE = id gender age edu marri poli Gtype
  Gsize Jage Gage time1 time2 Gpost Upost  act c1-c5 d1-d2 d5-d7 e1-e3 e4-e7 f1-f4 act1;
  !act hap sat inc exh hea con x;
  BETWEEN= act;
  CLUSTER = id;
  ANALYSIS:
  TYPE IS TWOLEVEL RANDOM;
  DEFINE:
  gender=gender;
  age=age;
  edu=edu;
  marri=marri;
  poli=poli;
  Gtype=Gtype;
  Gsize=Gsize;
  Jage=Jage;
  Gage=Gage;
  time1=time1;
  time2=time2;
  Gpost=Gpost;
  Upost=Upost;
  !center act (grandmean);
  act1=CLUSTER_MEAN(act);
  MODEL:
  !act BY a5-a12;
  hap BY c1-c5;
  sat BY d1-d2;
  exh BY e1-e3;
  hea BY e4-e7;
  con BY f1-f4;
  inc BY d5-d7;

  %WITHIN%
  hap ON exh(bw1);
  hap ON con(bw2);
  sat ON exh(bw3);
  sat ON con(bw4);
  hea ON exh(bw5);
  hea ON con(bw6);

  %BETWEEN%
  exh ON act1(a1) gender age edu marri poli Gtype inc
   Gsize Jage Gage time1 time2 Gpost Upost;
  con ON act1(a2) gender age edu marri poli Gtype inc
  Gsize Jage Gage time1 time2 Gpost Upost;
  hap ON exh(bb1) con(bb2) act1 gender age edu marri poli Gtype inc
  Gsize Jage Gage time1 time2 Gpost Upost;
  sat ON exh(bb3) con(bb4) act1 gender age edu marri poli Gtype inc
  Gsize Jage Gage time1 time2 Gpost Upost;
  hea ON exh(bb5) con(bb6) act1 gender age edu marri poli Gtype inc
  Gsize Jage Gage time1 time2 Gpost Upost;

  MODEL:constraint:
  new(ind1 ind2 ind3 ind4 ind5 ind6);
  ind1=a1*bb1;
  ind2=a1*bb3;
  ind3=a1*bb5;
  ind4=a2*bb2;
  ind5=a2*bb4;
  ind6=a2*bb6;
  OUTPUT: SAMPSTAT CINTERVAL;

*** ERROR in MODEL command
  The labels %BETWEEN% or %WITHIN% must be specified.


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