rotate | R Documentation |
Spherical rotation around given rotation axes
rotate(dec, inc, rdec, rinc, rmag)
dec |
declination of the data; it is the angle from the north taken on an horizontal plane. It is measured clockwise from North and ranges from 0 to 360° (Tauxe 2010). |
inc |
inclination of the data; it is the angle from the horizontal, is positive downward, and ranges from +90° for straight down to -90° for straight up (Tauxe, 2010). |
rdec |
declination of the rotation axes (of length 1 or n). |
rinc |
inclination of the rotation axes (of length 1 or n). |
rmag |
magnitude of rotation (following the notation of the Stereonet software): a positive rotation is clockwise looking in the direction of the given declination and inclination; of length 1 or n). |
Tauxe, L., 2010. Essentials of Paleomagnetism. University of California Press.
Allmendinger, R. W., Cardozo, N. C., and Fisher, D., 2013, Structural Geology Algorithms: Vectors & Tensors: Cambridge, England, Cambridge University Press, 289 pp.
Cardozo, N., and Allmendinger, R. W., 2013, Spherical projections with OSXStereonet: Computers & Geosciences, v. 51, no. 0, p. 193 - 205, doi: 10.1016/j.cageo.2012.07.021
rmatrix
, restore
and
reposition
earnet() inc <- seq(0,85,5) dec <- rep(0,length(inc)) earpoints(dec,inc) rdec <- rep(0, length(inc)) rinc <- rep(90, length(inc)) mag <- 90 rmag <- seq(mag, 0, by = -mag/(length(inc)-1)) rot <- rotate(dec,inc,rdec,rinc,rmag) earpoints(dec = round(rot$dec,digits = 2), inc = round(rot$inc,digits = 2), l = list(bg = "green"), u = list(bg = "blue"), h = list(bg = "yellow")) earpoints(dec = 0, inc = 90, l = list(bg = "red"))
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