spag.plot: Spaghetti Plot

Description

Makes a spaghetti plot of tree-ring data.

Usage

spag.plot(rwl, zfac = 1, useRaster = FALSE, res = 150, ...)

Value

None. This function is invoked for its side effect, which is to produce a plot.

Arguments

rwl: a data.frame with series as columns and years as rows such as that produced by read.rwl.
zfac: a multiplier for rwl to enhance clarity when plotting.
useRaster: A logical flag. If TRUE, the tree-ring series are drawn as a raster image. Other parts of the plot are not affected. Other choices are NA (automatic) and FALSE (use vector graphics, the default). See wavelet.plot.
res: A numeric vector of length 1. The resolution (pixels per inch) of the tree-ring series when a raster image is used.
...: arguments to be passed to lines.

Author

Andy Bunn. Patched and improved by Mikko Korpela.

Details

This makes a simple plot of each series in a tree-ring data set. Each series is centered first by subtracting the column mean using scale. The plot can be grossly tuned with zfac which is a multiplier to rwl before plotting and centering.

Ring-width indices (class "rwi", see as.rwi) are centred on 1, or on 0 if they are differences, and not on their means, so the grey line under each series is the value the indices should sit at.

Examples

Run this code

library(utils)
data(co021)
plot(co021,plot.type = "spag")
spag.plot(co021, zfac = 2)

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