Hello.
I have two simple and possibly stupid questions.
First, consider the following R snippet:
p <- function(y) {
g <- graph.adjacency(y, mode = "directed");
plot(g, layout = layout.spring);
}
par(mfrow=c(3, 1));
x <- matrix(0, nrow = 3, ncol = 3);
x[3, 2] <- 1; p(x); x[2, 3] <- 1;
p(x);
p(x); # Output differs.
Why does the output differ between the last two calls to p()?
Second, I wonder whether there is a simple explanation why triad.census()
may return negative values for empty subgraphs? This is with a large
real-world directed dataset; I didn't find an easy way to reproduce or
demonstrate this.
- Jukka.
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