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smatr (version 3.4-3)

(Standardised) Major Axis Estimation and Testing Routines

Description

This package provides methods of fitting bivariate lines in allometry using the major axis (MA) or standardised major axis (SMA), and for making inferences about such lines. The available methods of inference include confidence intervals and one-sample tests for slope and elevation, testing for a common slope or elevation amongst several allometric lines, constructing a confidence interval for a common slope or elevation, and testing for no shift along a common axis, amongst several samples.

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Version

Install

install.packages('smatr')

Monthly Downloads

729

Version

3.4-3

License

GPL-2

Maintainer

Remko Duursma

Last Published

January 6th, 2014

Functions in smatr (3.4-3)

slope.com

Common slope test amongst several allometric lines
lr.b.com

Likelihood ratio statistic, assuming a common slope (called by slope.com)
fitted.sma

Returns fitted values
print.sma

Print an object of class 'sma'.
elev.test

One-sample test of a (standardised) major axis elevation
elev.com

Test for equal elevation among several lines fitted with (standardised) major axes of common slope.
com.ci

Calculates a confidence inteval for a common slope (called by slope.com)
summary.sma

Print a summary
line.cis

Slope and elevation of a (standardised) major axis, with confidence intervals
smatr-package

(Standardised) Major Axis Estimation and Testing Routines
leaflife

Leaf longevity and leaf mass per area for plant species from different sites
plot.sma

Draw an X-Y plot
plotutils

Utility plotting functions
sma

(Standardized) major axis estimation and testing for one or several samples
alpha.fun

Utility functions for robust fitting
slope.test

One-sample test of a (standardised) major axis slope
multcompmatrix

Multiple comparisons graphical matrix
shift.com

Test for no mean shift along a common (standardised) major axis
makeLogMinor

Generate spacing for minor tick marks on a plot with log-scaled axes
seqLog

Sequence Generation
leafmeas

Leaf mass per area and photosynthetic rate for plant species from different sites
residuals.sma

Extract model residuals
b.com.est

Common slope estimation
meas.est

Measurement error variance estimation from repeated measures
coef.sma

Extract coefficients from a 'sma' or 'ma' fit