Nothing
test_that("graph_from_data_frame works", {
local_igraph_options(print.full = TRUE)
actors <- data.frame(
name = c(
"Alice", "Bob", "Cecil", "David",
"Esmeralda"
),
age = c(48, 33, 45, 34, 21),
gender = c("F", "M", "F", "M", "F"),
stringsAsFactors = FALSE
)
relations <- data.frame(
from = c(
"Bob", "Cecil", "Cecil", "David",
"David", "Esmeralda"
),
to = c(
"Alice", "Bob", "Alice", "Alice",
"Bob", "Alice"
),
same.dept = c(FALSE, FALSE, TRUE, FALSE, FALSE, TRUE),
friendship = c(4, 5, 5, 2, 1, 1), advice = c(4, 5, 5, 4, 2, 3),
stringsAsFactors = FALSE
)
g <- graph_from_data_frame(relations, directed = TRUE, vertices = actors)
df <- as_data_frame(g, what = "both")
expect_that(df$vertices, is_equivalent_to(actors))
expect_that(df$edges, equals(relations))
})
test_that("graph_from_data_frame() creates attributes for zero-row data frames (#466)", {
x <- data.frame(from = integer(), to = integer(), foo = integer(), bar = numeric())
g <- graph_from_data_frame(x)
expect_identical(E(g)$foo, integer())
expect_identical(E(g)$bar, numeric())
})
test_that("graph_from_data_frame works on matrices", {
el <- cbind(1:5, 5:1, weight = 1:5)
g <- graph_from_data_frame(el)
g <- delete_vertex_attr(g, "name")
el2 <- as_data_frame(g)
expect_that(as.data.frame(el), is_equivalent_to(el2))
})
test_that("as_long_data_frame() works correctly with and without names", {
expect_snapshot({
ring <- make_ring(3)
as_long_data_frame(ring)
V(ring)$name <- letters[1:3]
as_long_data_frame(ring)
V(ring)$score <- LETTERS[1:3]
as_long_data_frame(ring)
E(ring)$info <- 3:1
as_long_data_frame(ring)
})
})
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