xl.current.region: Read/write from/to Excel current region.

Description

Current region is a region that will be selected by pressing Ctrl+Shift+* in Excel. The current region is a range bounded by any combination of blank rows and blank columns. cr, crc, crr, crrc objects are already defined in the package. It doesn't need to create or init them.

Usage

xl.current.region(
  str.rng,
  drop = TRUE,
  na = "",
  row.names = FALSE,
  col.names = FALSE,
  ...
)
# S3 method for cr
[[(x, str.rng, drop = !(has.rownames(x) | has.colnames(x)), na = "", ...)
# S3 method for cr
[[(x, str.rng, na = "", ...) <- value

Value

Returns appropriate dataset from Excel.

Arguments

str.rng: character Excel range. For single bracket operations it can be without quotes in almost all cases.
drop: logical. If TRUE the result is coerced to the lowest possible dimension. By default dimensions will be dropped if there are no columns and rows names.
na: character. NA representation in Excel. By default it is empty string.
row.names: logical value indicating whether the Excel range contains the row names as its first column.
col.names: logical value indicating whether the Excel range contains the column names as its first row.
...: additional parameters. Not yet used.
x: One of cr, crc, crr, crrc objects. cr - read/write with/without column and row names, "r" - with rownames, "c" - with colnames
value: suitable replacement value. All data will be placed in Excel sheet starting from top-left cell of current region. Current region will be cleared before writing.

Details

cr object represents Microsoft Excel application. For convenient interactive usage arguments can be given without quotes in most cases (e. g. cr[a1] = 5 or cr[u2:u85] = "Hi" or cr[MyNamedRange] = 42, but cr["Sheet1!A1"] = 42). When it used in your own functions or you need to use variable as argument it is recommended apply double brackets notation: cr[["a1"]] = 5 or cr[["u2:u85"]] = "Hi" or cr[["MyNamedRange"]] = 42. Difference between cr, crc, crrc and crr is cr ignore row and column names, crc suppose read and write to Excel with column names, crrc - with column and row names and so on. There is argument drop which is TRUE by default for cr and FALSE by default for other options. All these functions never coerce characters to factors

Examples

Run this code


if (FALSE) { 
data(iris)
data(mtcars)
xl.workbook.add()
xlc$a1 = iris
identical(crc[a1],xlc[a1:e151]) # should be TRUE
identical(crc$a1,xlc[a1:e151]) # should be TRUE
identical(crc$a1,xlc[a1]) # should be FALSE

# current region will be cleared before writing - no parts of iris dataset
crrc$a1 = mtcars 
identical(crrc$a1,xlrc[a1:l33]) # should be TRUE

}