21 lines
484 B
R
21 lines
484 B
R
katz.cent <- function(A, alpha=NULL, beta=NULL){ #NULL sets the default value
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if (class(A) == 'igraph'){
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#Error checking. Turn into adj matrix.
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A <- get.adjacency(A)
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}
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lam.dom <- eigen(A)$values[1] #dom eigenvec
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if (is.null(alpha)){
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alpha <- 0.9 * (1/lam.dom) #Set alpha to 90% of max allowed
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}
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n <- nrow(A)
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if (is.null(beta)){
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beta <- matrix(rep(1/n, n),ncol=1)
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}
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#Katz scores
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scores <- solve(diag(n) - alpha*A,beta)
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return(scores)
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} |