RQDA (version 0.2-2)

getAttr: attributes

Description

Get the attributes of case or file.

Usage

getAttr(type = c("case", "file"),attrs = svalue(.rqda$.AttrNamesWidget),
        subset)

showSubset(x,...)

Arguments

type

Type of attributes.

attrs

character vector, subset of attributes to retrieve.

subset

when subset is not missing, return subset only.

x

an object from getAttr

...

Not used currently.

Value

• For getAttr, when type is "case", it is a data frame with class of "CaseAttr"; when type is "file", it is a data frame with class of "FileAttr". For showSubset, no value is returned, the side-effect is to change the file list or case list in respective widget.

Details

You can add and modify the attributes of cases or files. getAttr returns this attributes as a data frame. Sometimes, you only want to show a subset of files or cases according to their attributes. You can do the subset operation of the result from getAttr and pass it to showSubset, or you can pass a subset argument to GetAttr. The meaning of subset is the same as that in subset function.

Examples

attr <- getAttr("case")
showSubset(subset(attr,attribute1==1)) ## assuming there is a variable
named atttribute1 in attr.