如何在R的DiagrammeR包流程图节点内调整部分文本字体大小

Got it, you want to shrink part of the text inside a specific node in your DiagrammeR flowchart—here's a straightforward solution using Graphviz's HTML label support, which lets you fine-tune text sizing within a single node.

Modified Code with Partial Text Resizing #

library("DiagrammeR")

# Create node data frame (ndf) with HTML-formatted labels for partial text sizing
ndf <- create_node_df(
  n = 4,
  label = c(
    "aaa", 
    "bbb", 
    "<span style='font-size:14px;'>Same size</span><br/><span style='font-size:10px;'>These letters<br/>should be smaller</span>", 
    "ccc"
  ),
  shape = "rectangle",  # Critical: Shapes like rectangle support HTML rendering
  style = "filled",
  fillcolor = "#f0f8ff"
)

# Create edge data frame (edf)
edf <- create_edge_df(
  from = c(1, 2, 3, 3), 
  to = c(4, 3, 1, 4)
)

# Build and render the graph
graph <- create_graph(
  nodes_df = ndf,
  edges_df = edf
)

# View the final flowchart
render_graph(graph)

Key Details to Note: #

• HTML Label Formatting: We replace raw text with HTML elements to control text size. Use <span style='font-size:XXpx;'> to set precise pixel sizes for different text segments.
• Line Breaks: Use <br/> instead of \n for line breaks in HTML-formatted labels.
• Node Shape: Ensure your node uses a shape that supports HTML rendering (e.g., rectangle, roundedrect—avoid plaintext or ellipse if you need HTML styling).
• Alternative: Simplified Font Tags: If you prefer simpler syntax, you can use the <font size="2"> tag (size values range 1-7, default is 3) instead of CSS styling:

  "<font size='3'>Same size</font><br/><font size='2'>These letters<br/>should be smaller</font>"
  

If you wanted to resize an entire node's text (not just part of it), you could add a fontsize column to your node data frame, but for partial text control, HTML formatting is the most flexible approach.

内容的提问来源于stack exchange，提问作者Joachim Schork