env.single {macc} | R Documentation |
Simulated single-level dataset
Description
"env.single" is an R environment containing a data frame of data generated from 100 trials, the true coefficients and the coavariance matrix of the model errors.
Usage
data("env.single")
Format
An R environment.
data1
a data frame with
Z
the treatment assignment,M
the mediator andR
the interested outcome.Theta
a 2 by 2 matrix, which is the coefficients of the model.
Sigma
a 2 by 2 matrix, which is the covariance matrix of the model errors.
Details
The number of subjects is 100. The coefficients are set to be A = 0.5
, C = 0.5
and B = -1
. The variances of the model errors are \sigma_1^2 = 1
, \sigma_2^2 = 4
and the correlation is \delta = 0.5
. See Section 5.1 of the reference.
References
Zhao, Y., & Luo, X. (2014). Estimating Mediation Effects under Correlated Errors with an Application to fMRI. arXiv preprint arXiv:1410.7217.
Examples
data(env.single)
dt<-get("data1",env.single)