# The Grid Graphics Package

## Documentation for package ‘grid’ version 4.1.0

- DESCRIPTION file.
- User guides, package vignettes and other documentation.

## Help Pages

A B C D E F G H I L M N P R S T U V W X Y

grid-package | The Grid Graphics Package

## -- A --

absolute.size | Absolute Size of a Grob
addGrob | Add a Grid Graphical Object
applyEdit | Create and Apply Edit Objects
applyEdits | Create and Apply Edit Objects
arcCurvature | Draw a Curve Between Locations
arrow | Describe arrows to add to a line.
ascentDetails | Width and Height of a grid grob

## -- B --

bezierGrob | Draw a Bezier Curve
bezierPoints | Return the points that would be used to draw an Xspline (or a Bezier curve).

## -- C --

calcStringMetric | Calculate Metric Information for Text
childNames | Create Grid Graphical Objects, aka "Grob"s
circleGrob | Draw a Circle
clipGrob | Set the Clipping Region
convertHeight | Convert Between Different grid Coordinate Systems
convertUnit | Convert Between Different grid Coordinate Systems
convertWidth | Convert Between Different grid Coordinate Systems
convertX | Convert Between Different grid Coordinate Systems
convertY | Convert Between Different grid Coordinate Systems
current.parent | Get the Current Grid Viewport (Tree)
current.rotation | Get the Current Grid Viewport (Tree)
current.transform | Get the Current Grid Viewport (Tree)
current.viewport | Get the Current Grid Viewport (Tree)
current.vpPath | Get the Current Grid Viewport (Tree)
current.vpTree | Get the Current Grid Viewport (Tree)
curveGrob | Draw a Curve Between Locations

## -- D --

dataViewport | Create a Viewport with Scales based on Data
delayGrob | Encapsulate calculations and generating a grob
depth | Determine the number of levels in an object.
depth.path | Determine the number of levels in an object.
depth.viewport | Determine the number of levels in an object.
descentDetails | Width and Height of a grid grob
deviceDim | Convert Viewport Location to Device Location
deviceLoc | Convert Viewport Location to Device Location
downViewport | Maintaining and Navigating the Grid Viewport Tree
drawDetails | Customising grid Drawing

## -- E --

editDetails | Customising grid Editing
editGrob | Edit the Description of a Grid Graphical Object
editViewport | Modify a Viewport
emptyCoords | Calculate Points on the Perimeter of a Grob
engine.display.list | Control the Grid Display List
explode | Explode a path into its components.
explode.character | Explode a path into its components.
explode.path | Explode a path into its components.

## -- F --

forceGrob | Force a grob into its components
frameGrob | Create a Frame for Packing Objects
functionGrob | Draw a curve representing a function

## -- G --

gEdit | Create and Apply Edit Objects
gEditList | Create and Apply Edit Objects
get.gpar | Handling Grid Graphical Parameters
getGrob | Get a Grid Graphical Object
getNames | List the names of grobs on the display list
gList | Create Grid Graphical Objects, aka "Grob"s
gpar | Handling Grid Graphical Parameters
gPath | Concatenate Grob Names
Grid | Grid Graphics
grid.abline | Draw a curve representing a function
grid.add | Add a Grid Graphical Object
grid.bezier | Draw a Bezier Curve
grid.cap | Capture a raster image
grid.circle | Draw a Circle
grid.clip | Set the Clipping Region
grid.copy | Make a Copy of a Grid Graphical Object
grid.curve | Draw a Curve Between Locations
grid.delay | Encapsulate calculations and generating a grob
grid.display.list | Control the Grid Display List
grid.DLapply | Modify the Grid Display List
grid.draw | Draw a grid grob
grid.edit | Edit the Description of a Grid Graphical Object
grid.force | Force a grob into its components
grid.force.default | Force a grob into its components
grid.force.gPath | Force a grob into its components
grid.force.grob | Force a grob into its components
grid.frame | Create a Frame for Packing Objects
grid.function | Draw a curve representing a function
grid.gedit | Edit the Description of a Grid Graphical Object
grid.get | Get a Grid Graphical Object
grid.gget | Get a Grid Graphical Object
grid.grab | Grab the current grid output
grid.grabExpr | Grab the current grid output
grid.gremove | Remove a Grid Graphical Object
grid.grep | Search for grobs
grid.grill | Draw a Grill
grid.layout | Create a Grid Layout
grid.legend | Constructing a Legend Grob
grid.line.to | Move or Draw to a Specified Position
grid.lines | Draw Lines in a Grid Viewport
grid.locator | Capture a Mouse Click
grid.ls | List the names of grobs or viewports
grid.move.to | Move or Draw to a Specified Position
grid.newpage | Move to a New Page on a Grid Device
grid.null | Null Graphical Object
grid.pack | Pack an Object within a Frame
grid.path | Draw a Path
grid.place | Place an Object within a Frame
grid.plot.and.legend | A Simple Plot and Legend Demo
grid.points | Draw Data Symbols
grid.polygon | Draw a Polygon
grid.polyline | Draw Lines in a Grid Viewport
grid.pretty | Generate a Sensible Set of Breakpoints
grid.raster | Render a raster object
grid.record | Encapsulate calculations and drawing
grid.rect | Draw rectangles
grid.refresh | Refresh the current grid scene
grid.remove | Remove a Grid Graphical Object
grid.reorder | Reorder the children of a gTree
grid.revert | Force a grob into its components
grid.revert.gPath | Force a grob into its components
grid.revert.grob | Force a grob into its components
grid.roundrect | Draw a rectangle with rounded corners
grid.segments | Draw Line Segments
grid.set | Set a Grid Graphical Object
grid.show.layout | Draw a Diagram of a Grid Layout
grid.show.viewport | Draw a Diagram of a Grid Viewport
grid.text | Draw Text
grid.xaxis | Draw an X-Axis
grid.xspline | Draw an Xspline
grid.yaxis | Draw a Y-Axis
grob | Create Grid Graphical Objects, aka "Grob"s
grobAscent | Create a Unit Describing the Width of a Grob
grobCoords | Calculate Points on the Perimeter of a Grob
grobDescent | Create a Unit Describing the Width of a Grob
grobHeight | Create a Unit Describing the Width of a Grob
grobName | Generate a Name for a Grob
grobPathListing | List the names of grobs or viewports
grobPoints | Calculate Points on the Perimeter of a Grob
grobTree | Create Grid Graphical Objects, aka "Grob"s
grobWidth | Create a Unit Describing the Width of a Grob
grobX | Create a Unit Describing a Grob Boundary Location
grobY | Create a Unit Describing a Grob Boundary Location
gTree | Create Grid Graphical Objects, aka "Grob"s

## -- H --

heightDetails | Width and Height of a grid grob

## -- I --

is.grob | Create Grid Graphical Objects, aka "Grob"s
isEmptyCoords | Calculate Points on the Perimeter of a Grob

## -- L --

legendGrob | Constructing a Legend Grob
linearGradient | Define Gradient and Pattern Fills
linesGrob | Draw Lines in a Grid Viewport
lineToGrob | Move or Draw to a Specified Position

## -- M --

makeContent | Customised grid Grobs
makeContext | Customised grid Grobs
moveToGrob | Move or Draw to a Specified Position

## -- N --

nestedListing | List the names of grobs or viewports
nullGrob | Null Graphical Object

## -- P --

packGrob | Pack an Object within a Frame
pathGrob | Draw a Path
pathListing | List the names of grobs or viewports
pattern | Define Gradient and Pattern Fills
patterns | Define Gradient and Pattern Fills
placeGrob | Place an Object within a Frame
plotViewport | Create a Viewport with a Standard Plot Layout
pointsGrob | Draw Data Symbols
polygonGrob | Draw a Polygon
polylineGrob | Draw Lines in a Grid Viewport
popViewport | Maintaining and Navigating the Grid Viewport Tree
postDrawDetails | Customising grid Drawing
preDrawDetails | Customising grid Drawing
pushViewport | Maintaining and Navigating the Grid Viewport Tree

## -- R --

radialGradient | Define Gradient and Pattern Fills
rasterGrob | Render a raster object
recordGrob | Encapsulate calculations and drawing
rectGrob | Draw rectangles
removeGrob | Remove a Grid Graphical Object
reorderGrob | Reorder the children of a gTree
resolveHJust | Validate a Justification
resolveRasterSize | Utility function to resolve the size of a raster grob
resolveVJust | Validate a Justification
roundrect | Draw a rectangle with rounded corners
roundrectGrob | Draw a rectangle with rounded corners

## -- S --

seekViewport | Maintaining and Navigating the Grid Viewport Tree
segmentsGrob | Draw Line Segments
setChildren | Add a Grid Graphical Object
setGrob | Set a Grid Graphical Object
showGrob | Label grid grobs.
showViewport | Display grid viewports.
stringAscent | Create a Unit Describing the Width and Height of a String or Math Expression
stringDescent | Create a Unit Describing the Width and Height of a String or Math Expression
stringHeight | Create a Unit Describing the Width and Height of a String or Math Expression
stringWidth | Create a Unit Describing the Width and Height of a String or Math Expression

## -- T --

textGrob | Draw Text

## -- U --

unit | Function to Create a Unit Object
unit.c | Combine Unit Objects
unit.length | Length of a Unit Object
unit.pmax | Parallel Unit Minima and Maxima
unit.pmin | Parallel Unit Minima and Maxima
unit.psum | Parallel Unit Minima and Maxima
unit.rep | Replicate Elements of Unit Objects
unitType | Return the Units of a Unit Object
upViewport | Maintaining and Navigating the Grid Viewport Tree

## -- V --

valid.just | Validate a Justification
validDetails | Customising grid grob Validation
viewport | Create a Grid Viewport
vpList | Create a Grid Viewport
vpPath | Concatenate Viewport Names
vpStack | Create a Grid Viewport
vpTree | Create a Grid Viewport

## -- W --

widthDetails | Width and Height of a grid grob

## -- X --

xaxisGrob | Draw an X-Axis
xDetails | Boundary of a grid grob
xsplineGrob | Draw an Xspline
xsplinePoints | Return the points that would be used to draw an Xspline (or a Bezier curve).

## -- Y --

yaxisGrob | Draw a Y-Axis
yDetails | Boundary of a grid grob