getLinearRegressions: Get Linear Regressions BioTIME

In BioTIMEr: Tools to Use and Explore the 'BioTIME' Database

Get Linear Regressions BioTIME

Description

Fits linear regression models to getAlphaMetrics or getBetaMetrics outputs

Usage

getLinearRegressions(x, pThreshold = 0.05)

Arguments

x	(data.frame) BioTIME data table in the format of the output of getAlphaMetrics or getBetaMetrics functions
pThreshold	(numeric) P-value threshold for statistical significance

Details

The function getLinearRegression fits simple linear regression models (see lm for details) for a given output ('data') of either getAlphaMetrics or getBetaMetrics function. The typical model has the form metric ~ year. Note that assemblages with less than 3 time points and/or single species time series are removed.

Value

Returns a single long data.frame with results of linear regressions (slope, p-value, significance, intercept) for each assemblageID.

Examples

x <- gridding(BTsubset_meta, BTsubset_data) |>
resampling(measure = "BIOMASS", verbose = FALSE, resamps = 2)

  alpham <- getAlphaMetrics(x, "BIOMASS")

getLinearRegressions(x = alpham, pThreshold = 0.01) |> head(10)

  betam <- getBetaMetrics(x = x, "BIOMASS")

getLinearRegressions(x = betam) |> head(10)

BioTIMEr documentation built on Feb. 10, 2026, 5:08 p.m.