R: Draws a pointsvg object around a given point

centresvg {StratigrapheR}

R Documentation

Draws a pointsvg object around a given point

Description

Draws a svg object imported as data frame using pointsvg around a given point.

Usage

centresvg(
  object,
  x,
  y,
  xfac = 1,
  yfac = 1,
  xadj = 0,
  yadj = 0,
  forget = NULL,
  front = NULL,
  back = NULL,
  standard = FALSE,
  keep.ratio = FALSE,
  col = NA,
  border = "black",
  density = NA,
  angle = 45,
  lty = par("lty"),
  lwd = par("lwd"),
  scol = border,
  slty = lty,
  slwd = lwd,
  plot = TRUE,
  output = FALSE
)

centersvg(
  object,
  x,
  y,
  xfac = 1,
  yfac = 1,
  xadj = 0,
  yadj = 0,
  forget = NULL,
  front = NULL,
  back = NULL,
  standard = FALSE,
  keep.ratio = FALSE,
  col = NA,
  border = "black",
  density = NA,
  angle = 45,
  lty = par("lty"),
  lwd = par("lwd"),
  scol = border,
  slty = lty,
  slwd = lwd,
  plot = TRUE,
  output = FALSE
)

Arguments

`object`	a pointsvg object (svg object imported as data frame using `pointsvg`).
`x`, `y`	numeric vectors of coordinates where the object should be drawn.
`xfac`	the x size factor.
`yfac`	the y size factor.
`xadj`	value specifying the x adjustment of the drawing.
`yadj`	value specifying the y adjustment of the drawing.
`forget`	the elements that should be discarded, by their id or index (i.e. name or number of appearance).
`front`, `back`	the elements to be put in front and back position, by their id or index (i.e. name or number of appearance). By default the order is the one of the original .svg file.
`standard`	whether to standardise (centre to (0,0), rescale so that extreme points are at -1 and 1) or not (T or F)
`keep.ratio`	if the object is to be standardised, whether to keep the x/y ratio (T or F)
`col`	the polygones background color. If density is specified with a positive value this gives the color of the shading lines.
`border`	the lines color.
`density`	the density of shading lines, in lines per inch. The default value of NULL means that no shading lines are drawn.
`angle`	the slope of shading lines, given as an angle in degrees (counter-clockwise)
`lty`, `lwd`	the border line type and width, see ?par for details.
`scol`, `slty`, `slwd`	the colour, type and width of the shading lines.
`plot`	whether to add to a plot
`output`	whether to output the new object coordinates

Details

The centresvg and framesvg have a lot of similarities with the multigons function: the graphical parameters are mostly identical. However there is a strong distinction between the -svg functions and multigons: when providing several graphical arguments, multigons will attribute them to each polygon, whereas the .svg functions will use them for each repetition of the .svg object. Using the latter, the graphical parameters will be applied to all the elements of a drawing. If you want a finer personalisation you have to use multigons and multilines (or an hybrid of the two, yet to be coded).

Examples

object <- example.ammonite

plot(c(-10,10), c(-10,10), type = "n")

centresvg(object, 5, 5, xfac = 2, yfac = 2,lty = 1,density = 20, angle = 45)

points(5,5,pch = 19, col = "blue")