drawCurve: Draw a Curve on the Page
In draw: Wrapper Functions for Producing Graphics

Description Usage Arguments Value See Also Examples

Draws a curve on the page given positioning, dimensions and styling.

Figure: drawCurve Example

drawCurve(x, y, curvature = .pkgenv$curveCurvature,
  angle = .pkgenv$curveAngle, points = .pkgenv$curvePoints,
  shape = .pkgenv$curveShape, square = .pkgenv$curveSquare,
  squareShape = .pkgenv$curveSquareShape, opacity = .pkgenv$curveOpacity,
  lineColor = .pkgenv$curveLineColor, lineWidth = .pkgenv$curveLineWidth,
  lineType = .pkgenv$curveLineType, inflect = .pkgenv$curveInflect,
  open = .pkgenv$curveOpen, arrowAngle = .pkgenv$arrowAngle,
  arrowLength = .pkgenv$arrowLength, arrowUnits = .pkgenv$arrowUnits,
  arrowEnds = .pkgenv$arrowEnds, arrowType = .pkgenv$arrowType,
  units = .pkgenv$units, ...)

`x`	Numeric vector of length 2 for x-axis position of starting and ending points.
`y`	Numeric vector of length 2 for y-axis position of starting and ending points.
`curvature`	Numeric value for the curvature of the curve. Values of 0 create a straight line, negative values create left-hand curves, and positive values create right-hand curves.
`angle`	Numeric value of the curve control point skewness ranging from 0 to 180. Values less than 90 skew towards the start point, and values more than 90 skew towards the end point.
`points`	Numeric value for the number of curve control points with higher numbers creating a smoother curve.
`shape`	Numeric value for the shape of the curve ranging from -1 to 1 (See grid.xspline).
`square`	Logical value indicating whether curve control points are created in a city-block or oblique way. It is recommended to set this to TRUE if points is 1 and angle is 90, and FALSE otherwise (see grid.curve).
`squareShape`	Numeric value controlling curve behaviours relative to control points. Applies if square is TRUE.
`opacity`	Numeric value for the transparency with values ranging from 0 (transparent) to 1 (non-transparent).
`lineColor`	Character value for the color of the lines.
`lineWidth`	Numeric value for the width of the lines.
`lineType`	Character value for the line type. One of "blank", "solid", "dashed", "dotted", "dotdash", "longdash", or "twodash" (see "lty" in par).
`inflect`	Logical value indicating if the curve should be cut in half and inverted (TRUE) or not (FALSE).
`open`	Logical value indicating whether to open the curve (TRUE) or close the curve (FALSE).
`arrowAngle`	Numeric value of the angle for arrows. Smaller numbers create narrower arrows, and larger numbers produce wider arrows.
`arrowLength`	Numeric value of the length for arrows.
`arrowUnits`	Character value of the measurement unit for arrows.
`arrowEnds`	Character value indicating which end to draw arrows on lines. Must be one of "last", "first" or "both".
`arrowType`	Character value indicating if the arrow heads should be closed or open. Must be one of "open" or "closed".
`units`	Character value for the unit to use when specifying measurements.
`...`	Additional arguments passed to grid.curve.

A grid.curve grob object.

drawSettings

library(draw)

# Set drawing settings
drawSettings(pageWidth = 5, pageHeight = 5, units = "inches")

# Create a new drawing page
drawPage()

# Draw a curved angle
drawCurve(x = c(1, 4),
          y = c(1, 2),
          angle = 90)

# Draw a curved angle with arrows
drawCurve(x = c(1, 4),
          y = c(2, 3.75),
          angle = 90, arrowLength = 0.1, arrowEnd = "both")

# Draw an inflected curve
drawCurve(x = c(1, 4),
          y = c(3, 4),
          angle = 90, inflect = TRUE)

# Export the drawing page to a PDF
drawExport("drawCurve.pdf")