FielDHub (version 1.4.2)

CRD: Generates a Completely Randomized Design (CRD)

Description

It randomly generates a completely randomized design.

Usage

CRD(
  t = NULL,
  reps = NULL,
  plotNumber = 101,
  locationName = NULL,
  seed = NULL,
  data = NULL
)

Value

A list with two elements.

• infoDesign is a list with information on the design parameters.

• fieldBook is a data frame with the CRD field book.

Arguments

t

An integer number with total number of treatments or a vector of dimension t with labels.

reps

Number of replicates of each treatment.

plotNumber

Starting plot number. By default plotNumber = 101.

locationName

(optional) Name of the location.

seed

(optional) Real number that specifies the starting seed to obtain reproducible designs.

data

(optional) Data frame with the 2 columns with labels of each treatments and its number of replicates.

Author

Didier Murillo [aut], Salvador Gezan [aut], Ana Heilman [ctb], Thomas Walk [ctb], Johan Aparicio [ctb], Richard Horsley [ctb]

References

Federer, W. T. (1955). Experimental Design. Theory and Application. New York, USA. The Macmillan Company.

Examples

# Example 1: Generates a CRD design with 10 treatments and 5 reps each.
crd1 <- CRD(
  t = 10,
  reps = 5,
  plotNumber = 101,
  seed = 1987,
  locationName = "Fargo"
)
crd1$infoDesign
head(crd1$fieldBook, 10)

# Example 2: Generates a CRD design with 15 treatments and 6 reps each.
Gens <- paste("Wheat", 1:15, sep = "")
crd2 <- CRD(
  t = Gens,
  reps = 6,
  plotNumber = 1001,
  seed = 1654,
  locationName = "Fargo"
)
crd2$infoDesign
head(crd2$fieldBook, 10)

# Example 3: Generates a CRD design with 12 treatments and 4 reps each.
# In this case, we show how to use the option data.
treatments <- paste("ND-", 1:12, sep = "")
treatment_list <- data.frame(list(TREATMENT = treatments, REP = 4))
head(treatment_list)
crd3 <- CRD(
  t = NULL,
  reps = NULL,
  plotNumber = 2001,
  seed = 1655,
  locationName = "Cali",
  data = treatment_list
)
crd3$infoDesign
head(crd3$fieldBook, 10)