Showfry: Show Fry Diagrams
In geophys: Geophysics, Continuum Mechanics, Gravity Modeling

Description Usage Arguments Details Value Author(s) References See Also Examples

Show Fry Diagrams with random data

1	Showfry(RDAT, shear = matrix(c(1, 1.2, 0, 1)), rad = 75)

`RDAT`	data list
`shear`	2D shearing matrix
`rad`	radius of points from the center from which to select the points for analysis.

The original data is deformed and a circular subset is extracted for analysis. This is to show that the shape of the data does not affect the assessment of the fry ellipse. Plots input data and fry diagram, side by side.

graphical side effects

Jonathan M. Lees<jonathan.lees@unc.edu>

Fry, N., (1979) <http://dx.doi.org/10.1016/0040-1951(79)90135-5> Random point distributions and strain measurement in rocks Tectonophysics, 60:89-105.

dofry, plotfry, xtractlip

RDAT = randFRY(400, LIM=c(0,0, 200, 200) , rlen=5   )
length(RDAT$x)
plot(RDAT$x, RDAT$y, asp=1, pch=".", cex=2)

u = par( no.readonly = TRUE)


par(mfrow=c(3,2))
    shr = 0.0
simpleshear = matrix(c(1, shr, 0,  1), ncol=2)

Showfry(RDAT, simpleshear, 75)
    shr = 1.2
simpleshear = matrix(c(1, shr, 0,  1), ncol=2)

Showfry(RDAT, simpleshear, 75)

epsilon1 = 0.4
H = matrix(c(1+epsilon1, 0, 0,  1/(1+epsilon1) ), ncol=2)

Showfry(RDAT, H, 75)

par(u)