layout_rename_ph_labels function

Change ph labels in a layout

There are two versions of the function. The first takes a set of key-value pairs to rename the ph labels. The second uses a right hand side (rhs) assignment to specify the new ph labels. See section Details.

NB: You can also rename ph labels directly in PowerPoint. Open the master template view (Alt + F10) and go to Home > Arrange > Selection Pane.

layout_rename_ph_labels(x, layout, master = NULL, ..., .dots = NULL)

layout_rename_ph_labels(x, layout, master = NULL, id = NULL) <- value

Arguments

• x: An rpptx object.
• layout: Layout name or index. Index is the row index of layout_summary().
• master: Name of master. Only required if the layout name is not unique across masters.
• ...: Comma separated list of key-value pairs to rename phs. Either reference a ph via its label ("old label" = "new label") or its unique id ("id" = "new label").
• .dots: Provide a named list or vector of key-value pairs to rename phs (list("old label" = "new label").
• id: Unique placeholder id (see column id in layout_properties() or plot_layout_properties()).
• value: Not relevant for user. A pure technical necessity for rhs assignments.

Returns

Vector of renamed ph labels.

Details

• Note the difference between the terms id and index. Both can be found in the output of layout_properties(). The unique ph id is found in column id. The index refers to the index of the data frame row.

• In a right hand side (rhs) label assignment (\<- new_labels), there are two ways to optionally specify a subset of phs to rename. In both cases, the length of the rhs vector (the new labels) must match the length of the id or index:

  1. use the id argument to specify ph ids to rename: layout_rename_ph_labels(..., id = 2:3) \\<- new_labels
  2. use an index in squared brackets: layout_rename_ph_labels(...)[1:2] \\<- new_labels

Examples

x <- read_pptx()

# INFO -------------

# Returns layout's ph_labels by default in same order as layout_properties()
layout_rename_ph_labels(x, "Comparison")
layout_properties(x, "Comparison")$ph_label

# BASICS -----------
#
# HINT: run `plot_layout_properties(x, "Comparison")` to see how labels change

# rename using key-value pairs: 'old label' = 'new label' or 'id' = 'new label'
layout_rename_ph_labels(x, "Comparison", "Title 1" = "LABEL MATCHED") # label matching
layout_rename_ph_labels(x, "Comparison", "3" = "ID MATCHED") # id matching
layout_rename_ph_labels(x, "Comparison", "Date Placeholder 6" = "DATE", "8" = "FOOTER") # label, id

# rename using a named list and the .dots arg
renames <- list("Content Placeholder 3" = "CONTENT_1", "6" = "CONTENT_2")
layout_rename_ph_labels(x, "Comparison", .dots = renames)

# rename via rhs assignment and optional index (not id!)
layout_rename_ph_labels(x, "Comparison") <- LETTERS[1:8]
layout_rename_ph_labels(x, "Comparison")[1:3] <- paste("CHANGED", 1:3)

# rename via rhs assignment and ph id (not index)
layout_rename_ph_labels(x, "Comparison", id = c(2, 4)) <- paste("ID =", c(2, 4))

# MORE ------------

# make all labels lower case
labels <- layout_rename_ph_labels(x, "Comparison")
layout_rename_ph_labels(x, "Comparison") <- tolower(labels)

# rename all labels to type [type_idx]
lp <- layout_properties(x, "Comparison")
layout_rename_ph_labels(x, "Comparison") <- paste0(lp$type, " [", lp$type_idx, "]")

# rename duplicated placeholders (see also `layout_dedupe_ph_labels()`)
file <- system.file("doc_examples", "ph_dupes.pptx", package = "officer")
x <- read_pptx(file)
lp <- layout_properties(x, "2-dupes")
idx <- which(lp$ph_label == "Content 7") # exists twice
layout_rename_ph_labels(x, "2-dupes")[idx] <- paste("DUPLICATE", seq_along(idx))

# warning: in case of duped labels only the first occurrence is renamed
x <- read_pptx(file)
layout_rename_ph_labels(x, "2-dupes", "Content 7" = "new label")