如何拥有“一个"从ggraph图例中删除? [英] How to have "a" removed from a ggraph plot legend?

问题描述

是否可以将字母"a"从与之相关的图例中删除ggraph网络图中的fill或colour美学，就像下面的简单示例一样?

Can the letter "a" be removed from the legend associated with e.g. a fill or colour aesthetic, in a ggraph network plot, like in the simple example below ?

library(igraph)
library(ggraph)

g1 <- make_ring(6)
vertex_attr(g1) <- list(name = LETTERS[1:6],  type =rep(c("typeA", "typeB", "typeC"), 2))

ggraph(g1) + geom_node_label(aes(label = name, fill = type)) + 
  geom_edge_diagonal() + theme_graph()

在geom_text的情况下，show.legend = FALSE解决了该问题，

In the case of geom_text, show.legend = FALSE solves it,

在使用美学时从图例中删除"a"和geom_text

，但在geom_node_label()中添加show.legend = FALSE，将完全删除图例.

but adding show.legend = FALSE within geom_node_label(), removes the legend completely.

ggraph中对此有任何解决方案吗?

is there any solution for this in ggraph?

推荐答案

基于上述注释，对原始问题的答案: 根据@ user20650解决方案，必须在脚本顶部添加以下代码行.

Answer to the original question based on comments above: The following line of code has to be added on the top of the script as per @user20650 solution.

library(grid)
GeomLabel$draw_key <- function (data, params, size) { draw_key_rect(data) }

如果在geom_node_label中使用了repel = TRUE自变量，则除了上述GeomLabelRepel$draw_key <- GeomLabel$draw_key之外，还需要添加.

If repel = TRUE argument is used inside geom_node_label, then in addition to the above GeomLabelRepel$draw_key <- GeomLabel$draw_key needs to be added.

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