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Usually, we use a symmetric matrix for the `Sigma` parameter of `MASS::mvrnorm` function. #30

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danli349 opened this issue Sep 17, 2023 · 0 comments

danli349 commented Sep 17, 2023 •

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Usually, we use a symmetric matrix for the Sigma parameter of MASS::mvrnorm function.

# Fixed correlation
D_correlation = data.frame(MASS::mvrnorm(30, mu = c(0.9, 0.9), 
Sigma = matrix(c(1, 0.8, 1, 0.8), ncol = 2), empirical = TRUE))  # Correlated data

I think it should be Sigma = matrix(c(1, 0.8, 0.8, 0.8), ncol = 2)

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