inst/apps/testApp01/co2.md

In shafayetShafee/testApps: Run simple shiny apps

Carbon Dioxide Uptake in Grass Plants

Description

The CO2 data frame has 84 rows and 5 columns of data from an experiment on the cold tolerance of the grass species Echinochloa crus-galli.

Format

A data.frame containing the following columns:

• Plant an ordered factor with levels Qn1 \< Qn2 \< Qn3 \< ... \< Mc1 giving a unique identifier for each plant.

• Type a factor with levels Quebec Mississippi giving the origin of the plant

• Treatment a factor with levels nonchilled chilled

• conc a numeric vector of ambient carbon dioxide concentrations (mL/L).

• uptake a numeric vector of carbon dioxide uptake rates (umol/m\^2 sec).

Details

The CO2 uptake of six plants from Quebec and six plants from Mississippi was measured at several levels of ambient CO2 concentration. Half the plants of each type were chilled overnight before the experiment was conducted.

Source

• Potvin, C., Lechowicz, M. J. and Tardif, S. (1990) "The statistical analysis of ecophysiological response curves obtained from experiments involving repeated measures", Ecology, 71, 1389--1400.

• Pinheiro, J. C. and Bates, D. M. (2000) Mixed-effects Models in S and S-PLUS, Springer.

shafayetShafee/testApps documentation built on May 31, 2022, 7:25 p.m.