我正在尝试使用这个优秀的教程创建一个流程图:https://dannyjnwong.github.io/STROBE-CONSORT-Diagrams-in-R/
library(DiagrammeR)
library(DiagrammeRsvg) #Needed if you want to export the image
library(rsvg) #Needed if you want to export the image
#Set the values which will go into each label.
a1 <- 'Total available patients\n(n = x)'
b1 <- ''
c1 <- ''
d1 <- 'Included for analysis\n(n = x - y - z)'
e1 <- 'Data linked with\nexternal dataset'
a2 <- ''
b2 <- 'Excluded because of\nexclusion criteria (n = y)'
c2 <- 'Excluded because of\nmissing values (n = z)'
d2 <- ''
e2 <- ''
#Create a node dataframe
ndf <- create_node_df(
n = 10,
label = c(a1, b1, c1, d1, e1, #Column 1
a2, b2, c2, d2, e2), #Column 2
style = c('solid', 'invis', 'invis', 'solid', 'solid', #Column 1
'invis', 'solid', 'solid', 'invis', 'invis'), #Column 2
shape = c('box', 'point', 'point', 'box', 'box', #Column 1
'plaintext', 'box', 'box', 'point', 'point'), #Column 2
width = c(3, 0.001, 0.001, 3, 3, #Column 1
2, 2.5, 2.5, 0.001, 0.001), #Column 2
height = c(1, 0.001, 0.001, 1, 1, #Column 1
1, 1, 1, 0.001, 0.001), #Column 2
fontsize = c(rep(14, 10)),
fontname = c(rep('Helvetica', 10)),
penwidth = 1.5,
fixedsize = 'true')
#Create an edge dataframe
edf <- create_edge_df(
from = c(1, 2, 3, 4, #Column 1
6, 7, 8, 9, #Column 2
2, 3 #Horizontals
),
to = c(2, 3, 4, 5, #Column 1
7, 8, 9, 10, #Column 2
7, 8 #Horizontals
),
arrowhead = c('none', 'none', 'normal', 'normal', #Column 1
'none', 'none', 'none', 'none', #Column 2
'normal', 'normal' #Horizontals
),
color = c('black', 'black', 'black', 'black', #Column 1
'#00000000', '#00000000', '#00000000', '#00000000', #Column 2
'black', 'black' #Horizontals
),
constraint = c(rep('true', 8), #Columns
rep('false', 2) #Horizontals
)
)
g <- create_graph(ndf,
edf,
attr_theme = NULL)
render_graph(g)
结果应如下所示:
但是当我在计算机上运行代码时，它看起来像这样
有热心帮忙的吗？
此致，
H
最佳答案
也许有点晚，但总比没有好。
您必须使用 width = 0 创建两个节点和 height = 0 ，箭头可以从那里水平起源。它们需要定义为子图才能位于水平轴上。
DiagrammeR::grViz("digraph prisma{
node [shape=box, fontsize = 12, fontname = 'Helvetica', width = 2];
a; b; c; d; e
# create 2 nodes without box around
node [shape = point, width = 0, height = 0]
x1; x2
graph [splines=ortho, nodesep=1, dpi = 72]
# Labels
a [label = 'Total available patients\n(n = x)'];
b [label = 'Excluded because of\nexclusion criteria (n = y)'];
c [label = 'Excluded because of\nmissing values (n = z)'];
d [label = 'Included for analysis\n(n = x - y - z)']
e [label = 'Data linked with\nexternal dataset']
# Edge definitions
a -> x1 [arrowhead='none']
x1 -> x2 [arrowhead='none']
x1 -> b
x2 -> c
x2 -> d
d -> e
# Make subgraph definition so arrow is horzontal
subgraph {
rank = same; b; x1;
}
subgraph {
rank = same; c; x2;
}
}
}
")
创建于 2021-08-06 由 reprex package (v2.0.1)
session 信息
sessioninfo::session_info()
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#> setting value
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#> ui X11
#> language (EN)
#> collate de_CH.UTF-8
#> ctype de_CH.UTF-8
#> tz Europe/Zurich
#> date 2021-08-06
#>
#> ─ Packages ───────────────────────────────────────────────────────────────────
#> package * version date lib source
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关于r - DiagrammeR - 箭头问题，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/61745574/