Converts row & column based area references to Excel area references
idx2aref(x)Numeric (integer) matrix or vector of indices. If a matrix is provided it should have four columns with the first two columns representing the top left corner (row and column indices) and the third & fourth column representing the bottom right corner. If a vector is provided it will be converted to a matrix by filling the vector into a 4-column matrix by row.
Returns a character vector of corresponding Excel area references.
# NOT RUN {
idx2aref(c(1, 1, 5, 4))
# }