NAs introduced by coercion

From the ggm docs, it looks like the pcor() function, pcor(u, S) takes arguments:

  • u: a vector of integers of length > 1. The first two integers are the indices of variables the correlation of which must be computed. The rest of the vector is the conditioning set.
  • S: a symmetric positive definite matrix, a sample covariance matrix.

Not knowing what your data looks like, it's hard to say, but NAs by coersion occur when, for example, you try to convert a character to numeric.

#> Warning: NAs introduced by coercion
#> [1] NA

Given that the arguments for pcor() are numeric, you might be passing character strings where the function requires numeric.

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