Nothing
mm <- function(...) {
v <- as.numeric(as.vector(list(...)))
matrix(v, nrow = sqrt(length(v)))
}
am <- function(x) {
x <- as.matrix(x)
dimnames(x) <- NULL
x
}
g <- make_tree(20)
test_that("[ indexing works", {
## Are these vertices connected?
expect_that(g[1, 2], equals(1))
expect_that(am(g[c(1, 1, 7), c(2, 3, 14)]), equals(mm(1, 1, 0, 1, 1, 0, 0, 0, 1)))
expect_that(am(g[c(1, 1, 7), c(5, 3, 12)]), equals(mm(0, 0, 0, 1, 1, 0, 0, 0, 0)))
expect_that(am(g[c(1, 1, 1, 1), c(2, 3, 2, 2)]), equals(matrix(1, 4, 4)))
expect_that(am(g[c(8, 17), c(17, 8)]), equals(mm(1, 0, 0, 0)))
})
V(g)$name <- letters[1:vcount(g)]
test_that("[ indexing works with symbolic names", {
## The same with symbolic names
expect_that(g["a", "b"], equals(1))
expect_that(
am(g[c("a", "a", "g"), c("b", "c", "n")]),
equals(mm(1, 1, 0, 1, 1, 0, 0, 0, 1))
)
expect_that(
am(g[c("a", "a", "g"), c("e", "c", "l")]),
equals(mm(0, 0, 0, 1, 1, 0, 0, 0, 0))
)
expect_that(
am(g[c("a", "a", "a", "a"), c("b", "c", "b", "b")]),
equals(matrix(1, 4, 4))
)
expect_that(am(g[c("h", "q"), c("q", "h")]), equals(mm(1, 0, 0, 0)))
})
test_that("[ indexing works with logical vectors", {
## Logical vectors
lres <- structure(
c(
0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0
),
.Dim = c(2L, 20L),
.Dimnames = list(c("b", "c"), c(
"a", "b", "c",
"d", "e", "f", "g", "h", "i", "j", "k", "l",
"m", "n", "o", "p", "q", "r", "s", "t"
))
)
expect_that(g[degree(g, mode = "in") == 0, 2], equals(1))
expect_that(as.matrix(g[2:3, TRUE]), equals(lres))
})
test_that("[ indexing works with negative indices", {
## Negative indices
nres <- structure(
c(
0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0
),
.Dim = c(2L, 19L),
.Dimnames = list(
c("b", "c"),
c(
"b", "c", "d", "e", "f", "g", "h", "i", "j",
"k", "l", "m", "n", "o", "p", "q", "r", "s",
"t"
)
)
)
expect_that(as.matrix(g[2:3, -1]), equals(nres))
})
el <- as_edgelist(g, names = FALSE)
E(g)$weight <- el[, 1] * el[, 2]
test_that("[ indexing works with weighted graphs", {
## Weighted graphs
expect_that(g[1, 2], equals(2))
expect_that(am(g[c(1, 1, 7), c(2, 3, 14)]), equals(mm(2, 2, 0, 3, 3, 0, 0, 0, 98)))
expect_that(am(g[c(1, 1, 7), c(5, 3, 12)]), equals(mm(0, 0, 0, 3, 3, 0, 0, 0, 0)))
expect_that(
am(g[c(1, 1, 1, 1), c(2, 3, 2, 2)]),
equals(mm(2, 2, 2, 2, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2))
)
expect_that(am(g[c(8, 17), c(17, 8)]), equals(mm(136, 0, 0, 0)))
})
test_that("[ indexing works with weighted graphs and symbolic names", {
## Weighted graph, with symbolic names
expect_that(g["a", "b"], equals(2))
expect_that(
am(g[c("a", "a", "g"), c("b", "c", "n")]),
equals(mm(2, 2, 0, 3, 3, 0, 0, 0, 98))
)
expect_that(
am(g[c("a", "a", "g"), c("e", "c", "l")]),
equals(mm(0, 0, 0, 3, 3, 0, 0, 0, 0))
)
expect_that(
am(g[c("a", "a", "a", "a"), c("b", "c", "b", "b")]),
equals(mm(2, 2, 2, 2, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2))
)
expect_that(am(g[c("h", "q"), c("q", "h")]), equals(mm(136, 0, 0, 0)))
})
################################################################
test_that("[[ indexing works", {
## Adjacent vertices
expect_that(g[[1, ]], is_equivalent_to(list(a = V(g)[2:3])))
expect_that(g[[, 2]], is_equivalent_to(list(b = V(g)[1])))
expect_that(
g[[, 2, directed = FALSE]],
is_equivalent_to(list(b = V(g)[c(1, 4, 5)]))
)
expect_that(
g[[2, directed = FALSE]],
is_equivalent_to(list(b = V(g)[c(1, 4, 5)]))
)
expect_that(g[[1:3, ]], is_equivalent_to(list(
a = V(g)[2:3], b = V(g)[4:5],
c = V(g)[6:7]
)))
expect_that(g[[, 1:3]], is_equivalent_to(list(
a = V(g)[numeric()],
b = V(g)[1], c = V(g)[1]
)))
})
test_that("[[ indexing works with symbolic names", {
## Same with vertex names
expect_that(g[["a", ]], is_equivalent_to(list(a = V(g)[2:3])))
expect_that(g[[, "b"]], is_equivalent_to(list(b = V(g)[1])))
expect_that(
g[[, "b", directed = FALSE]],
is_equivalent_to(list(b = V(g)[c(1, 4, 5)]))
)
expect_that(
g[["b", directed = FALSE]],
is_equivalent_to(list(b = V(g)[c(1, 4, 5)]))
)
expect_that(
g[[letters[1:3], ]],
is_equivalent_to(list(a = V(g)[2:3], b = V(g)[4:5], c = V(g)[6:7]))
)
expect_that(
g[[, letters[1:3]]],
is_equivalent_to(list(a = V(g)[numeric()], b = V(g)[1], c = V(g)[1]))
)
})
test_that("[[ indexing works with logical vectors", {
## Logical vectors
expect_that(
g[[degree(g, mode = "in") == 0, ]],
is_equivalent_to(list(a = V(g)[2:3]))
)
})
test_that("[[ indexing works with filtering on both ends", {
## Filtering on both ends
expect_that(
g[[1:10, 1:10]],
is_equivalent_to(list(
a = V(g)[2:3], b = V(g)[4:5], c = V(g)[6:7], d = V(g)[8:9],
e = V(g)[10], f = V(g)[numeric()], g = V(g)[numeric()], h = V(g)[numeric()],
i = V(g)[numeric()], j = V(g)[numeric()]
))
)
})
test_that("[[ indexing is consistent with length()", {
expect_that(length(g), equals(vcount(g)))
})
################################################################
test_that("[ can query edge ids", {
## Query edge ids
expect_that(g[1, 2, edges = TRUE], equals(1))
expect_that(
am(g[c(1, 1, 7), c(2, 3, 14), edges = TRUE]),
equals(mm(1, 1, 0, 2, 2, 0, 0, 0, 13))
)
expect_that(
am(g[c(1, 1, 7), c(5, 3, 12), edges = TRUE]),
equals(mm(0, 0, 0, 2, 2, 0, 0, 0, 0))
)
expect_that(
am(g[c(1, 1, 1, 1), c(2, 3, 2, 2), edges = TRUE]),
equals(mm(1, 1, 1, 1, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1))
)
expect_that(
am(g[c(8, 17), c(17, 8), edges = TRUE]),
equals(mm(16, 0, 0, 0))
)
})
test_that("[ can query edge ids with symbolic names", {
## The same with symbolic names
expect_that(g["a", "b", edges = TRUE], equals(1))
expect_that(
am(g[c("a", "a", "g"), c("b", "c", "n"), edges = TRUE]),
equals(mm(1, 1, 0, 2, 2, 0, 0, 0, 13))
)
expect_that(
am(g[c("a", "a", "g"), c("e", "c", "l"), edges = TRUE]),
equals(mm(0, 0, 0, 2, 2, 0, 0, 0, 0))
)
expect_that(
am(g[c("a", "a", "a", "a"), c("b", "c", "b", "b"), edges = TRUE]),
equals(mm(1, 1, 1, 1, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1))
)
expect_that(
am(g[c("h", "q"), c("q", "h"), edges = TRUE]),
equals(mm(16, 0, 0, 0))
)
})
################################################################
test_that("[[ can query incident edges", {
## Incident edges of vertices
expect_that(g[[1, , edges = TRUE]], is_equivalent_to(list(a = E(g)[1:2])))
expect_that(g[[, 2, edges = TRUE]], is_equivalent_to(list(b = E(g)[1])))
expect_that(
g[[, 2, directed = FALSE, edges = TRUE]],
is_equivalent_to(list(b = E(g)[c(1, 3, 4)]))
)
expect_that(
g[[2, directed = FALSE, edges = TRUE]],
is_equivalent_to(list(b = E(g)[c(1, 3, 4)]))
)
expect_that(
g[[1:3, , edges = TRUE]],
is_equivalent_to(list(a = E(g)[1:2], b = E(g)[3:4], c = E(g)[5:6]))
)
expect_that(
g[[, 1:3, edges = TRUE]],
is_equivalent_to(list(a = E(g)[numeric()], b = E(g)[1], c = E(g)[2]))
)
})
test_that("[[ queries edges with vertex names", {
## Same with vertex names
expect_that(
g[["a", , edges = TRUE]],
is_equivalent_to(list(a = E(g)[1:2]))
)
expect_that(
g[[, "b", edges = TRUE]],
is_equivalent_to(list(b = E(g)[1]))
)
expect_that(
g[[, "b", directed = FALSE, edges = TRUE]],
is_equivalent_to(list(b = E(g)[c(1, 3, 4)]))
)
expect_that(
g[["b", directed = FALSE, edges = TRUE]],
is_equivalent_to(list(b = E(g)[c(1, 3, 4)]))
)
expect_that(
g[[letters[1:3], , edges = TRUE]],
is_equivalent_to(list(a = E(g)[1:2], b = E(g)[3:4], c = E(g)[5:6]))
)
expect_that(
g[[, letters[1:3], edges = TRUE]],
is_equivalent_to(list(a = E(g)[numeric()], b = E(g)[1], c = E(g)[2]))
)
## Filtering on both ends
expect_that(
g[[1:10, 1:10, edges = TRUE]],
is_equivalent_to(list(
E(g)[1:2], E(g)[3:4], E(g)[5:6], E(g)[7:8],
E(g)[9], E(g)[numeric()], E(g)[numeric()],
E(g)[numeric()], E(g)[numeric()], E(g)[numeric()]
))
)
})
#################################################################
test_that("[ handles from and to properly", {
## from & to
g <- make_tree(20)
expect_that(g[from = c(1, 2, 2, 3), to = c(3, 4, 8, 7)], equals(c(1, 1, 0, 1)))
V(g)$name <- letters[1:20]
expect_that(
g[from = c("a", "b", "b", "c"), to = c("c", "d", "h", "g")],
equals(c(1, 1, 0, 1))
)
E(g)$weight <- (1:ecount(g))^2
expect_that(
g[from = c("a", "b", "b", "c"), to = c("c", "d", "h", "g")],
equals(c(4, 9, 0, 36))
)
expect_that(g[
from = c("a", "b", "b", "c"), to = c("c", "d", "h", "g"),
edges = TRUE
], equals(c(2, 3, 0, 6)))
})
test_that("[[ works with from and to", {
g <- make_tree(20)
expect_equal(ignore_attr = TRUE, g[[1, ]], g[[from = 1]])
expect_equal(ignore_attr = TRUE, g[[, 1]], g[[to = 1]])
expect_equal(ignore_attr = TRUE, g[[1:5, 4:10]], g[[from = 1:5, to = 4:10]])
expect_error(g[[1, from = 1]], "Cannot give both")
expect_error(g[[, 2, to = 10]], "Cannot give both")
})
test_that("[[ returns vertex and edges sequences", {
g <- make_tree(20)
expect_true(is_igraph_vs(g[[1]][[1]]))
expect_true(is_igraph_es(g[[1, edges = TRUE]][[1]]))
expect_true(is_igraph_vs(g[[1:3, 2:6]][[1]]))
expect_true(is_igraph_es(g[[1:3, 2:6, edges = TRUE]][[1]]))
})
test_that("[[ handles from and to properly even if the graph has conflicting vertex attributes", {
## from & to
g <- make_tree(20)
V(g)$i <- 200:219
V(g)$j <- 200:219
expect_true(is_igraph_vs(g[[1:3, 2:6]][[1]]))
expect_true(is_igraph_vs(g[[from = 1:3, to = 2:6]][[1]]))
})
Any scripts or data that you put into this service are public.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.