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Last data update: 2014.03.03

R: Ring widths

ringWidths

R Documentation

Ring widths

Description

This function can compute the ring widths from the ring borders detected on an image section.

Usage

ringWidths(image, last.yr = NULL, ...)

Arguments

`image`	character or matrix. Either path of an image section or an array representing a gray matrix.
`last.yr`	year of formation of the newest ring. If NULL then the rings are numbered from one (right) to the number of detected rings (left).
`...`	arguments to be passed to `ringBorders`.

Value

data frame with the ring widths.

Author(s)

Wilson Lara, Carlos Sierra, Felipe Bravo

Examples

## (not run) Read one image section:
image1 <- system.file("P105_a.tif", package="measuRing")       
## (not run) columns in gray matrix to be included/excluded:
Toinc <- c(196,202,387,1564) 
Toexc <- c(21,130,197,207,1444,1484)
## (not run) tree-ring widths
rwidths <- ringWidths(image1,inclu = Toinc,exclu = Toexc,last.yr=NULL)
str(rwidths)
##plot of computed tree-ring widths:
maint <- 'Hello ring widths!'
plot(rwidths,type='l',col = 'red',main = maint,
     xlab = 'Year',ylab = 'Width (mm)')