breakPointsArrhenius: produce an Arrhenius plot for groups and calculate optimum...

In gtimmerhaus/aquaR: Functions for aquaculture related topics

Description

Plots and calcualtes the breakpoints for optimum temperature according to the Arrhenius method. The function censecutively adds measurements and calculates the correlation coefficient. If the coefficient is not increasing anymore it assumes that the linear phase ended and calculates the break point.

Usage

breakPointsArrhenius(x, group, col = "black", marks = T, obs = 3,
  error.bars = T, plot.results = T, main = F, ylim = c(4, 5.2),
  pch = 16, legend = T, xlab = "Temperature (<U+00B0>C)", ylab = "ln(HR max)")

Arguments

x	data matrix, numbers or NAs only, samples in lines, one column per measurement step.
col	color vector. Should have the same length as number of groups. Otherwise grey shades are used.
marks	add marks for the optimum temperature
obs	minimum number of observations to calculate the correlation in the linear phase. Default is 3.
error.bars	if TRUE, standard error bars are added
plot.results	plot results if TRUE (default). If FALSE, only calculated breakpoints are returned.
main	title of plot. Default is FALSE = no title
ylim	define own ylim
pch	define dot style
xlab	label for x-axis
ylab	label for y-axis
groups	group vector (must have same length as rows in data)
legeng	if TRUE, a legend is added

Examples

breakPointsArrhenius(x=data[,-1], group=groups)

gtimmerhaus/aquaR documentation built on May 17, 2019, 8:57 a.m.