Generate a tidy_layout for a SEM graph.

# S3 method for lavaan
get_layout(x, ..., layout_algorithm = "layout_as_tree")

get_layout(x, ...)

# S3 method for default
get_layout(x, ..., rows = NULL)



An object for which a method exists; currently, methods exist for character, lavaan, and mplus.model objects.


Character arguments corresponding to layout elements. Use node names, empty strings (""), or NA values.


Optional argument for fit model objects. Character string, indicating which igraph layout algorithm to apply to position the nodes. Defaults to "layout_as_tree"; see details for more options.


Numeric, indicating the number of rows of the graph.


Object of class 'tidy_layout'


There are three ways to generate a layout:

  1. Specify the layout in the call to get_layout() by providing node names and the number of rows to create a layout matrix. Empty strings ("") or NA can be used for empty cells. See Example 1.

  2. Call get_layout() on a model object or tidy_results object. It will use the function layout_as_tree, or any other layout function from the igraph package, to generate a rudimentary layout. See Example 2.

  3. Instead of using get_layout(), just use a matrix or data.frame with your layout. For example, specify the layout in a spreadsheet program, and load it into R (see Example 3). Or, copy the layout to the clipboard from your spreadsheet program, and load it from the clipboard (see Example 4)

The layout algorithms imported from igraph are: c("layout_as_star", "layout_as_tree", "layout_in_circle", "layout_nicely", "layout_on_grid", "layout_randomly", "layout_with_dh", "layout_with_fr", "layout_with_gem", "layout_with_graphopt", "layout_with_kk", "layout_with_lgl", "layout_with_mds"). These can be used by specifying the optional argument layout_algorithm = "".


# Example 1 get_layout("c", NA, "d", NA, "e", NA, rows = 2)
#> [,1] [,2] [,3] #> [1,] "c" NA "d" #> [2,] NA "e" NA #> attr(,"class") #> [1] "layout_matrix" "matrix" "array"
# Example 2 library(lavaan) fit <- cfa(' visual =~ x1 + x2 + x3 ', data = HolzingerSwineford1939[1:50, ])
#> Warning: lavaan WARNING: some estimated ov variances are negative
#> [,1] [,2] [,3] #> [1,] NA "visual" NA #> [2,] "x1" "x2" "x3" #> attr(,"class") #> [1] "layout_matrix" "matrix" "array"
if (FALSE) { # Example 3 # Here, we first write the layout to .csv, but you could create it in a # spreadsheet program, and save the spreadsheet to .csv: write.csv(matrix(c("c", "", "d", "", "e", ""), nrow = 2, byrow = TRUE), file = file.path(tempdir(), "example3.csv"), row.names = FALSE) # Now, we load the .csv: read.csv(file.path(tempdir(), "example3.csv")) # Example 4 # For this example, make your layout in a spreadsheet program, select it, and # copy to clipboard. Reading from the clipboard works differently in Windows # and Mac. For this example, I used Microsoft Excel. # On Windows, run: read.table("clipboard", sep = "\t") # On Mac, run: read.table(pipe("pbpaste"), sep="\t") }