Package 'grPipe'

Create New Graphviz Data.Frame (grPipe Nodes)

Description

if nrow or ncol parameters are equal zero, then the output will be an empty data.frame.

Usage

grPipe.create(nrow = 0, ncol = 0)

Arguments

nrow	integer
ncol	integer

Value

Returns a data.frame with 3 columns (id, id_next and text) where:

• if nrow==0 or ncol==0, then return an empty data.frame;

• if nrow>0 and ncol>0, then return a data.frame with one row:

  • id = paste0(LETTERS[nrow], ncol)

  • id_next = NA

  • text = NA

  • attr = NA

  • image = NA

Author(s)

Daniel Gaspar Gonçalves

Examples

nodes = grPipe.create()
nodes = grPipe.create(nrow = 2, ncol = 5)

---

Add or Update grPipe Nodes

Description

add a new node if it doesn't exist or update an existing one.

Usage

grPipe.node(
  nodes,
  id,
  id_next,
  text,
 
    attr = "style=filled, shape=box, fillcolor='#d3d3d3', color='#d3d3d3', margin='0.2,0'",
  image = NA
)

Arguments

nodes	data.frame
id	character
id_next	character
text	character
attr	character
image	character

Value

Returns a data.frame with 5 columns (id, id_next, text, attr and image) where:

• If id and id_next already exist in the data.frame nodes, then return the data.frame nodes with the value text updated;

• Otherwise, add a row in the data.frame nodes with the values passed (id, id_next and text) and then return the data.frame nodes.

Author(s)

Daniel Gaspar Gonçalves

Examples

nodes = grPipe.create(2,5)
nodes = grPipe.node(nodes, "A1",  "A2",  "input")
nodes = grPipe.node(nodes, "A2",  "B2",  "step 1")
nodes = grPipe.node(nodes, "B2",  "B3",  "step 2")
nodes = grPipe.node(nodes, "B3",  "B4",  "step 3")
nodes = grPipe.node(nodes, "B4",  "A4",  "step 4")
nodes = grPipe.node(nodes, "A4",  "A5",  "step 5")
nodes = grPipe.node(nodes, "A5",  NA,  "output")

---

Plot grPipe Nodes

Description

save grPipe nodes in pngfile path.

Usage

grPipe.plot(
  nodes,
  pngfile,
  title = "",
  plot = TRUE,
  showGrid = FALSE,
  colSpace = 0.5,
  rowSpace = 0.5
)

Arguments

nodes	data.frame
pngfile	character
title	character
plot	logical
showGrid	logical
colSpace	numeric
rowSpace	numeric

Value

No return value.

Author(s)

Daniel Gaspar Gonçalves

Examples

nodes = grPipe.create(2,5)
nodes = grPipe.node(nodes, "A1",  "A2",  "input")
nodes = grPipe.node(nodes, "A2",  "B2",  "step 1")
nodes = grPipe.node(nodes, "B2",  "B3",  "step 2")
nodes = grPipe.node(nodes, "B3",  "B4",  "step 3")
nodes = grPipe.node(nodes, "B4",  "A4",  "step 4")
nodes = grPipe.node(nodes, "A4",  "A5",  "step 5")
nodes = grPipe.node(nodes, "A5",  NA,  "output")
grPipe.plot(nodes, tempfile(), showGrid = TRUE)
grPipe.plot(nodes, tempfile(), showGrid = FALSE)

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