DiagrammeR如何改变地块背景

Question

折叠代码生成一个简单的图表，如何将整个图的背景更改为红色，而将节点的背景保持为B30668？

grViz(
  diagram = 
    "digraph flowchart {
        # define node aesthetics
        graph [fillcolor = red]
        node [fontname = Helvetica, shape = rectangle, fontcolor = black, arrowhead = none]        
      
      
        tab1 [label = '@@1', style = filled, fillcolor = '#B30668']
        tab2 [label = '@@2', style = filled, fillcolor = '#B30668']
        
        # set up node layout
        tab1 -> tab2;
        
        }
        
        [1]: 'a'
        [2]: 'b'

        ")

Answer 1

可以使用bgcolor在DiagrammeR中设置背景，如下所示：

library(DiagrammeR)
grViz(
  diagram = 
    "digraph flowchart {
        # define node aesthetics
        graph [fillcolor = red]
        node [fontname = Helvetica, shape = rectangle, fontcolor = black, arrowhead = none]
        bgcolor = red
      
      
        tab1 [label = '@@1', style = filled, fillcolor = '#B30668']
        tab2 [label = '@@2', style = filled, fillcolor = '#B30668']
        
        # set up node layout
        tab1 -> tab2;
        
        }
        
        [1]: 'a'
        [2]: 'b'

        ")

输出：

​

​