Retrieval of file names according to their codings.

To retrieve file names according to their codings.

queryFiles(or=NULL, and = NULL, not = NULL, names = TRUE)

Arguments

or	integer vector of code id.
and	integer vector of code id.
not	integer vector of code id.
names	logical, returns file names when TRUE.

Details

Let fid.or are files coded by any code from or, fid.and are files coded by all codes of and, and fid.not are files not coded by any code of not. Then the result is setdiff(intersect(fid.or, fid.and), fid.not).

This function is succeeded by filesCodedByAnd, filesCodedByOr, filesCodedByNot and their operators.

Value

A vector of file id when names is FALSE. A vector of file names, with the side effect of updating files widget with these file names when names is TRUE.

Author

HUANG Ronggui

Examples

if (FALSE) {
queryFiles(or=1:2) ## files coded to code 1 or 2.
queryFiles(and=1:2) ## files coded to code 1 and 2.
queryFiles(or=1:2, not=3:4) ## files coded to code 1 or 2 but neither 3 nor 4.
}