knotR: Knot Diagrams using Bezier Curves

`k4_1` <-
structure(list(minsymvec = structure(c(-18.6244360817146, -240.690755857761, 
-19.0719832635993, -30.3912254192467, -76.1693432138769, 110.930812372104, 
-313.577475684969, -380.273757499575, -138.843168877294, 187.7596902795, 
-156.039852793996, -400.601597657645, 81.3760747829302, -579.123686350185, 
-97.3372040054673, -186.811298039558, -64.7244158658445, -69.9295408893311, 
-406.996592094635, -188.960666172866, -42.5744045582065, 316.002580467413, 
446.530186642797, -241.98640036461, -419.145115956057, 127.721007583912, 
-135.867778212019, -597.188998833357), .Names = c("handle_A1", 
"handle_A2", "handle_A3", "handle_A6", "handle_A7", "handle_A10", 
"handle_A11", "handle_A12", "handle_A15", "handle_A16", "handle_A20", 
"handle_A21", "handle_A25", "handle_A26", "node1", "node2", "node6", 
"node7", "node11", "node12", "node15", "node16", "node17", "node20", 
"node21", "node24", "node25", "node26"), class = "minsymvec"), 
    overunderobj = structure(c(5, 8, 1, 11, 10, 13, 6, 2), .Dim = c(4L, 
    2L)), symobj = structure(list(Mver = structure(c(2, 11, 1, 
    6, 7, 12, 4, 9, 5, 14, 13, 8), .Dim = c(6L, 2L)), xver = c(3, 
    10), Mhor = NULL, xhor = NULL, Mrot = NULL, exact_h = NULL, 
        exact_v = NULL, mcdonalds = FALSE, celtic = FALSE, reefknot = FALSE, 
        center_crossing = FALSE, indep = structure(c(TRUE, TRUE, 
        TRUE, FALSE, FALSE, TRUE, TRUE, FALSE, FALSE, TRUE, TRUE, 
        TRUE, FALSE, FALSE, TRUE, TRUE, FALSE, FALSE, FALSE, 
        TRUE, TRUE, FALSE, FALSE, FALSE, TRUE, TRUE, FALSE, FALSE, 
        TRUE, TRUE, FALSE, FALSE, FALSE, TRUE, TRUE, FALSE, FALSE, 
        FALSE, TRUE, TRUE, FALSE, FALSE, TRUE, TRUE, TRUE, FALSE, 
        FALSE, TRUE, TRUE, FALSE, FALSE, TRUE, TRUE, TRUE, FALSE, 
        FALSE), .Names = c("handle_A1", "handle_A2", "handle_A3", 
        "handle_A4", "handle_A5", "handle_A6", "handle_A7", "handle_A8", 
        "handle_A9", "handle_A10", "handle_A11", "handle_A12", 
        "handle_A13", "handle_A14", "handle_A15", "handle_A16", 
        "handle_A17", "handle_A18", "handle_A19", "handle_A20", 
        "handle_A21", "handle_A22", "handle_A23", "handle_A24", 
        "handle_A25", "handle_A26", "handle_A27", "handle_A28", 
        "node1", "node2", "node3", "node4", "node5", "node6", 
        "node7", "node8", "node9", "node10", "node11", "node12", 
        "node13", "node14", "node15", "node16", "node17", "node18", 
        "node19", "node20", "node21", "node22", "node23", "node24", 
        "node25", "node26", "node27", "node28"))), .Names = c("Mver", 
    "xver", "Mhor", "xhor", "Mrot", "exact_h", "exact_v", "mcdonalds", 
    "celtic", "reefknot", "center_crossing", "indep"))), .Names = c("minsymvec", 
"overunderobj", "symobj"), class = "knot")