Drawing RCBDs with Agricolae
The agricolae
package is very helpful when you want to "draw" out the design of an experiment for yourself using R. It can draw many different kinds of experiments, including a randomized complete block design. Here's an example of one:
[,1] [,2] [,3] [,4]
[1,] "D" "C" "A" "B"
[2,] "B" "A" "D" "C"
[3,] "D" "A" "B" "C"
[4,] "A" "B" "D" "C"
In this RCBD, we have 4 blocks (each row of the output). Inside of each block, each treatment "A", "B", "C", and "D" is used, because this is a complete design. So if these 4 blocks/rows of the output were four fields of a farmer's, they should give the first field the "D" treatment in the first season, then "C", then "A", then "B".
Let's draw an RCBD design with 5 treatments and 4 blocks, which go in the r
argument. The agricolae
package has been loaded for you.
This exercise is part of the course
Experimental Design in R
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Create designs using ls()
___ <- ls("package:agricolae", pattern = "design")
___