fertilizer: fertilizer: The Length of Roots Measured Over Time
In thoree/stat340: Data and functions for BIAS at NMBU

fertilizer

R Documentation

fertilizer: The Length of Roots Measured Over Time

Description

The length of plants, as measured by root is recorded for 12 plants. Each of the plants was observed at week 2, 4, 6, 8 and 10. Six of the plants had fertilizer added, and six plants are controls.

Usage

fertilizer

Format

A data frame with 60 observations (rows) and 4 variables (columns).

	Column name	Data type	Description	Values
`[,1]`	`root`	numeric	Measured length of the root	(0.8 - 11.1)
`[,2]`	`week`	integer	Time of measurement in weeks	(2 - 10)
`[,3]`	`plant`	factor	ID for plant	(ID1...ID12)
`[,4]`	`treatment`	factor	2 levels of treatment	(control, fertilizer)

Details

This data has been generated at NMBU.
In ⁠The R book⁠ the variable treatment is named “fertilizer”.

Source

⁠The R book⁠, M.J. Crawley, Wiley, 2013.

Examples


# All measurements from week 10
week10 <- fertilizer[which(fertilizer$week == 10),]

# Boxplot of root length in week 10
boxplot(root ~ treatment, data = week10)

thoree/stat340 documentation built on June 30, 2024, 4:04 p.m.