Retrieves the design information (experimental metadata) associated with observations in various object types. This function provides a consistent interface for accessing design variables regardless of the specific object structure.
Usage
design(x, ...)
# S3 method for class 'multidesign'
design(x, ...)
# S3 method for class 'multiframe'
design(x, ...)Value
The design component of the object (typically a data frame or tibble), or a list of designs for hyperdesign objects
Details
The function behaves differently depending on the class of the input object: * For multidesign objects: Returns the design data frame component * For hyperdesign objects: Returns a list of design data frames, one for each block (or a single design if a specific block is requested) * For multiframe objects: Returns the design tibble with observation functions
Design information typically includes experimental factors, conditions, subject IDs, or other metadata associated with each observation.
See also
xdata for extracting the data matrix,
column_design for extracting column metadata
Examples
# With a multidesign object
X <- matrix(rnorm(20*10), 20, 10)
Y <- data.frame(
condition = rep(c("A", "B"), each=10),
subject = rep(1:5, times=4)
)
mds <- multidesign(X, Y)
design_info <- design(mds) # Returns the original data frame Y
# With a hyperdesign object
d1 <- multidesign(matrix(rnorm(10*5), 10, 5),
data.frame(condition=rep(c("A","B"), 5), subject=1))
d2 <- multidesign(matrix(rnorm(10*5), 10, 5),
data.frame(condition=rep(c("A","B"), 5), subject=2))
hd <- hyperdesign(list(d1, d2))
all_designs <- design(hd) # Returns list of design data frames
block1_design <- design(hd, block=1) # Returns just the first block's design