r - Meta分析流程图

Question

是否可以使用任何 R 工具重现如下图所示的元分析类型的流程图？

我的尝试是使用mermaid：

diagram = "
graph LR
  subgraph Screening
    b1-->b2
end
  subgraph Eligibility
    c1-->c2
  end
  subgraph Included
    d1-->d2
  end
  subgraph Identification
    a1-->a2
  end



"
mermaid(diagram)

这产生了：

但是我找不到跨子图连接节点的方法。

还有其他工具更适合这种工作吗？我正在考虑可以在我的 Rmarkdown 文档中使用的任何包。

Answer 1

我发现 DiagrammeR 包最容易做到这一点。一般的想法是这样的：

library(glue)
library(DiagrammeR)

excluded <- glue('Full text articles excluded
             n = 1000
             Reasons for exclusion
             Reason 1
             Reason 2')
grViz("
digraph cohort_flow_chart
{
node [fontname = Helvetica, fontsize = 12, shape = box, width = 4]
a[label = 'Records identified in original search']
b[label = 'Records identified with update']
c[label = 'Records after duplicates removed']
d[label = 'Records screened']
e[label = 'Records excluded']
f[label = 'Full text articles assessed']
g[label = 'Studies included']
h[label = '@@1']



{ rank = same; a b}
{ rank = same; d, e}
{ rank = same; f, h}

a -> c;
b -> c;
c -> d;
d -> e [ minlen = 3 ];
d -> f;
f -> h [ minlen = 3 ];
f -> g;
}

[1]: excluded
")

看起来像：

带有标签和空节点的图像

grViz("
digraph cohort_flow_chart
{
node [fontname = Helvetica, fontsize = 12, shape = box, width = 4]
i[label = 'Identification', fillcolor = LightBlue, 
  style = filled,     width = 2]
j[label = 'Screening',fillcolor = LightBlue, style = filled, width = 2]
k[label = 'Eligibility', fillcolor = LightBlue, style = filled, 
  width = 2]
l[label = 'Included', fillcolor = LightBlue, style = filled, width = 2]

a[label = 'Records identified in original search']
b[label = 'Records identified with update']
c[label = 'Records after duplicates removed']
d[label = 'Records screened']
e[label = 'Records excluded']
f[label = 'Full text articles assessed']
g[label = 'Studies included']
h[label = '@@1']
blank_1[label = '', width = 0.01, height = 0.01]
blank_2[label = '', width = 0.01, height = 0.01]
blank_4[label = '', width = 4, color = White]

{ rank = same; a b i}
{ rank = same; blank_4 c j}
{ rank = same; f k}
{ rank = same; g l}
{ rank = same; blank_1 e}
{ rank = same; blank_2 h}

a -> c;
b -> c;
b -> blank_4 [ dir = none, color = White];
c -> d;
d -> blank_1 [ dir = none ];
blank_1 -> e [ minlen = 3 ];
blank_1 -> f;
f -> blank_2 [ dir = none ];
blank_2 -> h [ minlen = 3 ];
blank_2 -> g;

}

[1]: excluded
")