earplanes {StratigrapheR}

Draws planes on an equal area stereonet

Description

Draws planes on an equal area stereonet (modified from RFOC package)

Usage

earplanes(
  strike,
  dip,
  quadrant = NA,
  hsphere = "l",
  ndiv = 10,
  a = list(col = "black", lwd = 1),
  l = list(lty = 1),
  u = list(lty = 3),
  output = FALSE,
  plot = TRUE,
  xh = "WE",
  unique = TRUE
)

Arguments

strike

strike of the data; it is the angle from the north of the horizontal line of the plane. It is corrected by the dipfix function.

dip

dip of the data; it is the angle from the horizontal taken on the line of the plane perpendicular to the one of the strike. It is corrected by the dipfix function.

quadrant

the quadrant were the plane dips downward. Accepted values are NA, 'N', 'S', 'W' or 'E' (lower- or uppercase alike) for correction by the dipfix function.

hsphere

the hemisphere onto which to project the data. Either "b" for both, "l" for lower, and u" for upper.

ndiv

the number of intervals between each 10° (in declination)

a, l, u

list of graphical parameters to feed lines() for the all lines, or for the lines of the upper (u) and lower (l) hemisphere (the two latter override a). See ?lines help page for the possible arguments. See ?merge_list for further information.

output

whether to return an output (position of the points making the lines in the stereographic projection)

plot

whether to plot

xh

orientation of the x axis: can be 'WE' or 'SN'.

unique

whether to only plot each similar plan once.

Value

the x,y coordinates of each projected plane

References

RFOC package

See Also

earnet, earpoints and dipfix

Examples

strike   <- c(45,  0)
dip      <- c(20, 65)

earnet()
earplanes(strike,dip,hsphere = "b")

encircle(earinc(dip))