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seg_1
2010 Oct 25
1
structural equation modeling in sem, error, The model has negative degrees of freedom = -3, and The model is almost surely misspecified...
...density <-> density, ps2, NA
>ALL_Jack1 <-> ALL_Jack1, theta1, NA
>dec_mean_EVI <-> density, theta2, NA
>dec_mean_EVI <-> ALL_Jack1, theta2, NA
>density <-> ALL_Jack1, theta3, NA
I then try to run the sem analysis using the matrix and model.
>sem_1 <- sem(ram = tmodel, S = S_matrix, N = 88, fixed.x =
c("dec_mean_EVI"))
>summary(sem_1)
However, I only get the following error message:
"Error in sem.default(ram = ram, S = S, N = N, param.names = pars,
var.names = vars, :
The model has negative degrees of freedom = -...