The "QcMetadata" class — QcMetadata-class • qcmetrics

The QcMetadata class is a simple interface to metadata. The objects can be displayed with show for a summary and print for the content.

Objects from the Class

Objects can be created by calls of the form QcMetadata(...).

Slots

metadata:: Object of class "list" that stores the metadata variables. The list must be named. NA and empty characters are not allowed.

Methods

[: signature(x = "QcMetadata"): subsets x as a new QcMetadata instance.
[[: signature(x = "QcMetadata"): extracts a single element of x.
metadata: signature(x = "QcMetadata"): return the object's metadata list. Also available as mdata.
metadata<-: signature(x = "QcMetadata", value = "list"): sets the objects metadata. Also available as mdata.
length: signature(x = "QcMetadata"): returns the number of metadata variables.
names: signature(x = "QcMetadata"): returns the names of the metadata variables.

Author

Laurent Gatto

Examples

QcMetadata(metadata =
           list(name = "John Doe",
                lab = "Big Lab in Big Uni"))
#> Object of class "QcMetadata"
#>  containing 2 variables.
## less typing
qmd <- QcMetadata(list(name = "John Doe",
                       lab = "Big Lab in Big Uni"))
mdata(qmd)
#> $name
#> [1] "John Doe"
#> 
#> $lab
#> [1] "Big Lab in Big Uni"
#> 
show(qmd)
#> Object of class "QcMetadata"
#>  containing 2 variables.
print(qmd)
#> name 
#>  [1] "John Doe"
#> lab 
#>  [1] "Big Lab in Big Uni"