| ibr_std {IBRtools} | R Documentation |
Standardized values for IBR (Integrated Biomarker Response) index
Description
Returns a data frame with standardized values of IBR useful to do a radar chart. This data is fit for our function ibr_chart() from this package that creates this type of plot.
Usage
ibr_std(df, z)
Arguments
df |
A data frame containing values the enzymes activities with at least two levels of one independent variable. |
z |
A data frame with the Z coefficient for each enzyme at each level. If not provided, all z values will be 1. |
Value
Returns a data frame with standardized values for each biomarker per treatment
Warnings
You must have at least 3 biomarkers and a maximum of 9 biomarkers to perform this index correctly.
References
Beliaeff, B., & Burgeot, T. (2002). Integrated biomarker response: A useful tool for ecological risk assessment. Environmental Toxicology and Chemistry, 21(6), 1316–1322.
Devin, S., Burgeot, T., Giambérini, L., Minguez, L., & Pain-Devin, S. (2014). The integrated biomarker response revisited: Optimization to avoid misuse. Environmental Science and Pollution Research, 21(4), 2448–2454. https://doi.org/10.1007/s11356-013-2169-9
Examples
data(enzact)
ibr_std(enzact, enzact_coef)