Nothing
am <- function(x) {
x <- as.matrix(x)
dimnames(x) <- NULL
x
}
test_that("[ can add and delete edges", {
g <- make_empty_graph(10)
A <- matrix(0, 10, 10)
A[1, 2] <- g[1, 2] <- TRUE
expect_that(am(g[]), equals(A))
A[2, 1] <- g[2, 1] <- TRUE
expect_that(am(g[]), equals(A))
g[2, 1] <- NULL
A[2, 1] <- 0
expect_that(am(g[]), equals(A))
A[1, 2] <- g[1, 2] <- FALSE
expect_that(am(g[]), equals(A))
g <- make_empty_graph(10)
A <- matrix(0, 10, 10)
A[-1, 1] <- g[-1, 1] <- 1
expect_that(am(g[]), equals(A))
})
test_that("[ can set weights and delete weighted edges", {
g <- make_empty_graph(10)
A <- matrix(0, 10, 10)
g <- set_edge_attr(g, "weight", c(), 1)
A[1, 2] <- g[1, 2] <- 1
expect_that(am(g[]), equals(A))
A[2, 1] <- g[2, 1] <- 2
expect_that(am(g[]), equals(A))
A[1, 2] <- g[1, 2] <- 3
expect_that(am(g[]), equals(A))
A[1:2, 2:3] <- g[1:2, 2:3] <- -1
expect_that(am(g[]), equals(A))
g[1, 2] <- NULL
A[1, 2] <- 0
expect_that(am(g[]), equals(A))
})
test_that("[ can add edges and ste weights via vertex names", {
g <- make_empty_graph(10)
A <- matrix(0, 10, 10)
V(g)$name <- letters[1:vcount(g)]
rownames(A) <- colnames(A) <- letters[1:vcount(g)]
A["a", "b"] <- g["a", "b"] <- TRUE
A["b", "c"] <- g["b", "c"] <- TRUE
expect_that(am(g[]), equals(am(A)))
A[c("a", "f"), c("f", "a")] <- g[c("a", "f"), c("f", "a")] <- TRUE
expect_that(am(g[]), equals(am(A)))
A[A == 1] <- NA
A[c("a", "c", "h"), c("a", "b", "c")] <-
g[c("a", "c", "h"), c("a", "b", "c"), attr = "weight"] <- 3
expect_that(am(g[]), equals(am(A)))
})
test_that("[ and the from-to notation", {
g <- make_empty_graph(10)
A <- matrix(0, 10, 10)
V(g)$name <- letters[1:vcount(g)]
rownames(A) <- colnames(A) <- letters[1:vcount(g)]
g[from = c("a", "c", "h"), to = c("a", "b", "c")] <- 1
A["a", "a"] <- A["c", "b"] <- A["h", "c"] <- 1
expect_that(
g[from = c("a", "c", "h", "d"), to = c("a", "b", "c", "e")],
equals(c(1, 1, 1, 0))
)
expect_that(am(g[]), equals(am(A)))
g[from = c("a", "c", "h", "a"), to = c("a", "a", "a", "e"), attr = "weight"] <- 3
A[A != 0] <- NA
A["a", "a"] <- A["c", "a"] <- A["h", "a"] <- A["a", "e"] <- 3
expect_that(g[
from = c("a", "c", "h", "a", "c", "c"),
to = c("a", "a", "a", "e", "f", "b")
], equals(c(3, 3, 3, 3, 0, NA)))
expect_that(am(g[]), equals(am(A)))
})
test_that("[ and from-to with multiple values", {
g <- make_empty_graph(10)
A <- matrix(0, 10, 10)
V(g)$name <- letters[1:vcount(g)]
rownames(A) <- colnames(A) <- letters[1:vcount(g)]
g[from = c("a", "c", "h"), to = c("a", "b", "c")] <- 1
A["a", "a"] <- A["c", "b"] <- A["h", "c"] <- 1
g[from = c("a", "c", "h", "a"), to = c("a", "a", "a", "e"), attr = "weight"] <- 5:8
A[A != 0] <- NA
A["a", "a"] <- 5
A["c", "a"] <- 6
A["h", "a"] <- 7
A["a", "e"] <- 8
expect_that(g[
from = c("a", "c", "h", "a", "c", "c"),
to = c("a", "a", "a", "e", "f", "b")
], equals(c(5:8, 0, NA)))
expect_that(am(g[]), equals(am(A)))
})
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