How to get the adjacency matrix from the dag?

Question

I know how to generate a DAG.

library(pcalg)
dag <- randDAG(10, 1, "er") 

But now I need to get the adjacency matrix of the above dag. I guess there exists such a function but I don't know what it is.

The chatgpt give me the false result:

# Get the adjacency matrix from the DAG
adjacency_matrix <- amat(dag)

# Print or inspect the adjacency matrix
print(adjacency_matrix)

But unfortunately, Error in amat(dag) : could not find function "amat"

Answer 1

You can use showAmat

library(pcalg)

dag <- randDAG(10, 1, "er") 
amat <- showAmat(dag)
amat
#>    1         2 3 4         5 6         7         8 9 10
#> 1  0 0.0000000 0 0 0.4144231 0 0.0000000 0.0000000 0  0
#> 2  0 0.0000000 0 0 0.0000000 0 0.0000000 2.0000000 0  0
#> 3  0 0.0000000 0 0 0.0000000 0 0.7542406 0.7771955 0  0
#> 4  0 0.0000000 0 0 0.0000000 0 0.0000000 0.0000000 0  0
#> 5  2 0.0000000 0 0 0.0000000 0 0.0000000 0.0000000 0  0
#> 6  0 0.0000000 0 0 0.0000000 0 0.0000000 0.0000000 0  0
#> 7  0 0.0000000 2 0 0.0000000 0 0.0000000 0.0000000 0  0
#> 8  0 0.3098213 2 0 0.0000000 0 0.0000000 0.0000000 0  0
#> 9  0 0.0000000 0 0 0.0000000 0 0.0000000 0.0000000 0  0
#> 10 0 0.0000000 0 0 0.0000000 0 0.0000000 0.0000000 0  0