R officer package: Add slide numbers that reflect current slide position

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I'm an avid user of the Reporters and Officer packages and currently trying to transition to Officer for a Powerpoint workflow. I'm using a slide template that includes slide number placeholders in the master.

When using Reporters, I am able to add the slide numbers using doc <-addPageNumber( doc ) and the page numbers reflect the current position each slide has in the deck. I am looking for the same functionality in Officer, and looking for the slide numbers to update appropriately when I move the slides.

When I use ph_with_text(doc, type = "sldNum", str = "slide 1"), I am required to supply a string with a static number or text, and it does not update according to where the slide appears in the deck. For example, if I know my slide will be slide 2, I can enter str = "2", but then the slide number will read as 2 even if I move that slide to the slide 3 position in the presentation.

I tried leaving the string empty with str = "" or with ph_empty(type= "sldNum") but these result in the string "Slide Number" appearing on the slide.

Any help or pointers in the right direction would be appreciated!

I've successfully added page numbers using officer 0.3.4 with a for loop after I'm done with the presentation.

library(officer)
library(magrittr)

my_pres <- read_pptx()  %>% 
  add_slide('Title Only', 'Office Theme') %>%
  ph_with(value = 'Slide 2 Title', location = ph_location_type(type = "title")) %>%
  add_slide('Title Only', 'Office Theme') %>%
  ph_with(value = 'Slide 3 Title', location = ph_location_type(type = 'title')) 

# add slide numbers starting on slide 2

n_slides <- length(my_pres)
for (i_slide in 2:n_slides) {
  my_pres <- my_pres %>%
    on_slide(index = i_slide) %>%
    ph_with(value = i_slide, location = ph_location_type('sldNum'))
}

How to Add Slide Numbers in PowerPoint the RIGHT way (Step-by , How do I change the number of slide positions in PowerPoint? Using R: officer package (R3.6.3), with this set of code linestrying to change font size in body of pptx slide. As we know that Slide Number and Slide Name is

Having faced a similar issue with officer and taking a look in the source code I came up with the following solution

ph_with_text_fld(doc, type = "sldNum", str = "2")

The code for that function follows:

library(htmltools)
library(xml2)

ph_with_text_fld <- function( x, str, type = "title", index = 1 ){

  stopifnot( type %in% c("ctrTitle", "subTitle", "dt", "ftr", "sldNum", "title", "body") )

  slide <- x$slide$get_slide(x$cursor)
  sh_pr_df <- slide$get_xfrm(type = type, index = index)
  sh_pr_df$str <- str
  xml_elt <- do.call(pml_shape_str_fld, sh_pr_df)
  node <- as_xml_document(xml_elt)

  xml_add_child(xml_find_first(slide$get(), "//p:spTree"), node)

  slide$fortify_id()
  x
}

pml_shape_str_fld <- function(str, ph, offx, offy, cx, cy, ...) {

  sp_pr <- sprintf("<p:spPr><a:xfrm><a:off x=\"%.0f\" y=\"%.0f\"/><a:ext cx=\"%.0f\" cy=\"%.0f\"/></a:xfrm></p:spPr>", offx, offy, cx, cy)
  # sp_pr <- "<p:spPr/>"
  nv_sp_pr <- "<p:nvSpPr><p:cNvPr id=\"\" name=\"\"/><p:cNvSpPr><a:spLocks noGrp=\"1\"/></p:cNvSpPr><p:nvPr>%s</p:nvPr></p:nvSpPr>"
  nv_sp_pr <- sprintf( nv_sp_pr, ifelse(!is.na(ph), ph, "") )
  paste0( pml_with_ns("p:sp"),
          nv_sp_pr, sp_pr,
          "<p:txBody><a:bodyPr/><a:lstStyle/><a:p><a:fld id=\"{GUID FROM THE MASTER TEMPLATE}\" type=\"slidenum\"><a:rPr/><a:t>",
          htmlEscape(str),
          "</a:t></a:fld></a:p></p:txBody></p:sp>"
  )
}

pml_with_ns <- function(x){
  base_ns <- "xmlns:a=\"http://schemas.openxmlformats.org/drawingml/2006/main\" xmlns:r=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships\" xmlns:p=\"http://schemas.openxmlformats.org/presentationml/2006/main\""
  sprintf("<%s %s>", x, base_ns)
}

The important part is

<a:fld id=\"{GUID FROM THE MASTER TEMPLATE}\" type=\"slidenum\">

where GUID FROM THE MASTER TEMPLATE needs to be replaced with the GUID from the Slidemaster Layout for that Field

officer package function for adding an R plot to a presentation , rvg also allows us to edit our plots on the slides. If you would like to export R graphs to Powerpoint you can also use the wrapper package export built on top of  To preview all animation effects on the slide, on the Animations tab, under Preview, click Play. Move the motion path on the slide. In the navigation pane, select the slide that contains the animation effect that you want to change, and then click the Animation tab. How to select slides in the navigation pane. On the View menu, click Normal.

I came here looking for a more elegant solution than I have, but I thought I would at least offer this because it does technically solve your/our problem, just inelegantly.

It makes it easier to move around the slides without worrying about the slide numbers, but it does at a little cruft as well and you have to be careful to increment it even if you don't have a slide number slot (as in the case of my "Title" slide).

An alternative is to write yourself a simple increment operator a la this question.

presentation_name_here <- officer::read_pptx("Presentations/Template.pptx")

slide_number <- 1

# Title slide -----------------------------------------------------------
presentation_name_here <- presentation_name_here %>%
  add_slide(layout = "Title Slide", master = "Office Theme") %>%
  ph_with(value = "Title", location = ph_location_label(ph_label = "Title")) %>%
slide_number <- slide_number + 1

# Executive summary -----------------------------------------------------
presentation_name_here <- presentation_name_here %>%
  add_slide(layout = "Title and Content", master = "Office Theme") %>%
  ph_with(value = "Executive summary", location = ph_location_label(ph_label = "Title")) %>%
  ph_with(value = slide_number, location = ph_location_label(ph_label = "Slide Number")) %>%
slide_number <- slide_number + 1

# Dashboard ---------------------------------------------------------------
presentation_name_here <- presentation_name_here %>%
  add_slide(layout = "Title and Content", master = "Office Theme") %>%
  ph_with(value = "Dashboard", location = ph_location_label(ph_label = "Title")) %>%
  ph_with(value = slide_number, location = ph_location_label(ph_label = "Slide Number"))

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How to add hyperlinks to word docx using officeR? - r, R officer package: Add slide numbers that reflect current slide position. I'm an avid user of the Reporters and Officer packages and currently trying to transition to  Add placeholders to a slide layout. Placeholders are boxes on a slide layout that you click to add content when you're creating a presentation. In slide master view, you can add placeholders to a new slide layout, or change the look of an existing slide layout. On the View menu, point to Master, and then click Slide Master.

[PDF] Automated Generation of PowerPoint Presentations Using R in , In the meantime, we should also create a PowerPoint slide deck (say, topline Functions of the package can add and remove tables, library(flextable). > library(officer). 6. 1. Install R. 2. Install the above packages. 3. |25 |Office Theme |Title and Content |sldNum |6 |Slide Number Placeholder 5 | 7.17| 6.95| 2.33| 0.40|. Applies to: Captivate. Master slides define background and common objects such as logos, headers, and footers for your slides. They provide a uniform appearance for your entire project. All the artefacts on a master slide, such as, objects and placeholders reflect on the slide that is linked with the master slide.

Comments
  • Thanks for posting! This works to put numbers on the pages, however it still remains an issue that when I change the slide order in the resulting presentation, the slide numbers do not update to reflect the new position as they would if I were adding slide numbers to a presentation that I created entirely in Powerpoint.