fc_filter: fc_filter

In flowchart: Tidy Flowchart Generator

fc_filter

Description

This function allows to filter the flowchart in function of a expression that returns a logic value that are defined in terms of the variables in the database. It will generate one box per group showing the number of rows of the group that matches the condition, and will retain only those rows in the data base.

Usage

fc_filter(
  object,
  filter = NULL,
  N = NULL,
  label = NULL,
  text_pattern = "{label}\n {n} ({perc}%)",
  perc_total = FALSE,
  show_exc = FALSE,
  direction_exc = "right",
  label_exc = "Excluded",
  text_pattern_exc = "{label}\n {n} ({perc}%)",
  sel_group = NULL,
  round_digits = 2,
  trim_trailing_zeros = FALSE,
  just = "center",
  text_color = "black",
  text_fs = 8,
  text_fface = 1,
  text_ffamily = NA,
  text_padding = 1,
  bg_fill = "white",
  border_color = "black",
  width = NA,
  height = NA,
  just_exc = "center",
  text_color_exc = "black",
  text_fs_exc = 6,
  text_fface_exc = 1,
  text_ffamily_exc = NA,
  text_padding_exc = 1,
  bg_fill_exc = "white",
  border_color_exc = "black",
  offset_exc = NULL,
  width_exc = NA,
  height_exc = NA,
  title = NULL,
  x_title = 0.1,
  text_color_title = "black",
  text_fs_title = 10,
  text_fface_title = 1,
  text_ffamily_title = NA,
  text_padding_title = 0.6,
  bg_fill_title = "#B3D1FF",
  border_color_title = "black",
  width_title = NA,
  height_title = NA
)

Arguments

object	fc object that we want to filter.
filter	Expression that returns a logical value and are defined in terms of the variables in the data frame. The data base will be filtered by this expression, and it will create a box showing the number of rows satisfying this condition.
N	Number of rows after the filter in case filter is NULL.
label	Character or expression that will be the title of the box. By default it will be the evaluated condition.
text_pattern	Character or expression defining the structure that will have the text in each of the boxes. It recognizes label, n, N and perc within brackets. For default it is "{label}\n {n} ({perc}%)". If text_pattern or label is an expression, the label is always placed at the beginning of the pattern, followed by a line break where the structure specified by text_pattern is placed.
perc_total	logical. Should percentages be calculated using the total number of rows at the beginning of the flowchart? Default is FALSE, meaning that they will be calculated using the number at the parent leaf.
show_exc	Logical value. If TRUE a box showing the number of excluded rows will be added to the flow chart.
direction_exc	One of "left" or "right" indicating if the exclusion box goes into the left direction or in the right direction. By default is "right".
label_exc	Character or expression that will be the title of the added box showing the excluded patients. By default it will show "Excluded".
text_pattern_exc	Character or expression defining the structure that will have the text in the exclude box. It recognizes label, n, N and perc within brackets. For default it is "{label}\n {n} ({perc}%)". If text_pattern or label is an expression, the label is always placed at the beginning of the pattern, followed by a line break where the structure specified by text_pattern_exc is placed.
sel_group	Select the group in which to perform the filter. The default is NULL. Can only be used if the flowchart has previously been split. If the flowchart has more than one group, it can either be given the full name as it is stored in the ⁠$fc⁠ component (separated by '\'), or it can be given as a vector with the names of each group to be selected.
round_digits	Number of digits to round percentages. It is 2 by default.
trim_trailing_zeros	Logical value. If TRUE, allows trailing zeros after the decimal to be trimmed (default is FALSE).
just	Justification for the text: "left", "center" or "right". Default is "center".
text_color	Color of the text. It is "black" by default. See the col parameter for gpar.
text_fs	Font size of the text. It is 8 by default. See the fontsize parameter for gpar.
text_fface	Font face of the text. It is 1 by default. See the fontface parameter for gpar.
text_ffamily	Changes the font family of the text. Default is NA. See the fontfamily parameter for gpar.
text_padding	Changes the text padding inside the box. Default is 1. This number has to be greater than 0.
bg_fill	Box background color. It is "white" by default. See the fill parameter for gpar.
border_color	Box border color. It is "black" by default. See the col parameter for gpar.
width	Width of the box. If NA, it automatically adjusts to the content (default). Must be an object of class unit or a number between 0 and 1.
height	Height of the box. If NA, it automatically adjusts to the content (default). Must be an object of class unit or a number between 0 and 1.
just_exc	Justification for the text of the exclude box: "left", "center" or "right". Default is "center".
text_color_exc	Color of the text of the exclude box. It is "black" by default. See text_color.
text_fs_exc	Font size of the text of the exclude box. It is 6 by default. See text_fs.
text_fface_exc	Font face of the text of the exclude box. It is 1 by default. See the fontface parameter for gpar. See text_fface.
text_ffamily_exc	Changes the font family of the text of the exclude box. Default is NA. See the fontfamily parameter for gpar. See text_ffamily.
text_padding_exc	Changes the text padding inside the exclude box. Default is 1. This number has to be greater than 0.
bg_fill_exc	Exclude box background color. It is "white" by default. See bg_fill.
border_color_exc	Box background color of the exclude box. It is "black" by default. See border_color.
offset_exc	Amount of space to add to the distance between the box and the excluded box (in the x coordinate). If positive, this distance will be larger. If negative, it will be smaller. This number has to be at least between 0 and 1 (plot limits) and the resulting x coordinate cannot exceed these plot limits. The default is NULL (no offset).
width_exc	Width of the exclude box. If NA, it automatically adjusts to the content (default). Must be an object of class unit or a number between 0 and 1.
height_exc	Height of the box. If NA, it automatically adjusts to the content (default). Must be an object of class unit or a number between 0 and 1.
title	Add a title box to the filter. Default is NULL.
x_title	x-coordinate of the title box. Default is 0.1 (placed in the left).
text_color_title	Color of the title text. It is "black" by default.
text_fs_title	Font size of the title text. It is 8 by default.
text_fface_title	Font face of the title text. It is 1 by default. See the fontface parameter for gpar.
text_ffamily_title	Changes the font family of the title text. Default is NA. See the fontfamily parameter for gpar.
text_padding_title	Changes the title text padding inside the box. Default is 1. This number has to be greater than 0.
bg_fill_title	Title box background color. It is "white" by default.
border_color_title	Title box border color. It is "black" by default.
width_title	Width of the title box. If NA, it automatically adjusts to the content (default). Must be an object of class unit or a number between 0 and 1.
height_title	Height of the title box. If NA, it automatically adjusts to the content (default). Must be an object of class unit or a number between 0 and 1.

Value

List with the filtered dataset and the flowchart parameters with the resulting filtered box.

Examples

safo |>
  as_fc(label = "Patients assessed for eligibility") |>
  fc_filter(!is.na(group), label = "Randomized", show_exc = TRUE) |>
  fc_draw()

flowchart documentation built on Nov. 26, 2025, 5:08 p.m.