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Dear Linda and Bengt, I am using Linear Growth Model with Definition Variable Approach.I want to characterize longitudinal waist circumference (WC) trajectories during adulthood . I want to plot WC over age.Waist circumference is measured at 6 times so we have WC1-WC6 and age1-age6 MY model converged and the slope variance was positive. now I want to add the classes. please help me with my syntax how can I ADD CLASS TO MY SYNTAX ?? and see plot DATA: FILE= MPLUS_WAISTage18_40_2TIMES.dat; VARIABLE: NAMES = id sex WAIST1-WAIST6 age1-age6; MISSING ARE ALL (99999); USEVAR = WAIST1-WAIST6; CONSTRAINT = age1-age6 ; ANALYSIS: TYPE = MEANSTRUCTURE; MODEL: eta_1 BY WAIST1-WAIST6 @1; eta_2 BY WAIST1 * (L1) WAIST2 (L2) WAIST3 (L3) WAIST4 (L4) WAIST5 (L5) WAIST6 (L6); eta_1 eta_2; eta_1 WITH eta_2; [eta_1 eta_2]; WAIST1-WAIST6 (theta); [ WAIST1-WAIST6 @0]; MODEL CONSTRAINT: L1 = (age1-18); L2 = (age2-18); L3 = (age3-18); L4 = (age4-18); L5 = (age5-18); L6 = (age6-18); OUTPUT: SAMPSTAT STANDARDIZED; |
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When you say "add the classes", I assume you mean Analysis Type=Mixture. If so, see examples in the UG, chapter 8. |
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Dear Linda and Bengt, Thank you for your response yes I mean Analysis Type=Mixture and I run this syntax base on your Tips would you mind please check my syntax because I see this message Among my output and the Class Counts and Proportions for class 3 is 0 ONE OR MORE PARAMETERS WERE FIXED TO AVOID SINGULARITY OF THE INFORMATION MATRIX. THE SINGULARITY IS MOST LIKELY BECAUSE THE MODEL IS NOT IDENTIFIED, OR BECAUSE OF EMPTY CELLS IN THE JOINT DISTRIBUTION OF THE CATEGORICAL VARIABLES IN THE MODEL. THE FOLLOWING PARAMETERS WERE FIXED: Parameter 15, %C#3%: [ ETA_1 ] Parameter 16, %C#3%: [ ETA_2 ] Parameter 21, [ C#3 ] |
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This is my syntax TITLE: Linear Growth Model - Definition Variable Approach; DATA: FILE= MPLUS_WAISTage18_40_2TIMES.dat; VARIABLE: NAMES = id sex WAIST1-WAIST6 age1-age6; MISSING ARE ALL (99999); USEVAR = WAIST1-WAIST6; CONSTRAINT = age1-age6; CLASSES = c(4); Savedata: file is CLASS_WAIST.txt; save = cprob; ANALYSIS: TYPE = MIXTURE; MODEL: %OVERALL% eta_1 BY WAIST1-WAIST6 @1; eta_2 BY WAIST1*(L1) WAIST2 (L2) WAIST3 (L3) WAIST4 (L4) WAIST5 (L5) WAIST6 (L6); eta_1 (psi_11); eta_2; eta_1 WITH eta_2; [eta_1 eta_2]; WAIST1-WAIST6 (theta); [WAIST1-WAIST6@0]; %c#1% [eta_1 eta_2]; %c#2% [eta_1 eta_2]; %c#3% [eta_1 eta_2]; %c#4% [eta_1 eta_2]; MODEL CONSTRAINT: L1 = (age1-18); L2 = (age2-18); L3 = (age3-18); L4 = (age4-18); L5 = (age5-18); L6 = (age6-18); OUTPUT: SAMPSTAT STANDARDIZED; |
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