ger_UNC {GerminaR}

Germination Uncertainty

Description

This function calculates the germination uncertainty in the germination process.

Usage

ger_UNC(evalName, data)

Arguments

evalName

Prefix of the names of the periods of evaluation.

data

The name of the data frame containing the data.

Details

The uncertainty index u is an adaptation of Shannon index measures the degree of uncertainty in predicting the informational entropy or uncertainty associated with the distribution of the relative frequency of germination (GOUVEA LABOURIAU 1983; LABOURIAU; VALADARES, 1983). Low values of u indicate frequencies with short peaks, i.e. the more concentrated the germination in time. Just a germinated seed changes the value of u. This means that u measures the degree of germination scattering.

Value

It returns an vector with the values of Germination Uncertainty.

References

GOUVEA LABOURIAU, L. L. G. L. A germinacao das sementes. Washington. LABOURIAU, L. G.; VALADARES, M. E. B. The germination of seeds. OEA, Washington, DC, 1983.

Examples

library(GerminaR)
dfr <- prosopis
unc <- ger_UNC(evalName = "D", data = dfr)
unc