cell_limits: Create a cell_limits object

Description

A cell_limits object is a list with three components:

Usage

cell_limits(ul = c(NA_integer_, NA_integer_), lr = c(NA_integer_, NA_integer_), sheet = NA_character_)
"dim"(x)
as.cell_limits(x, ...)
"as.cell_limits"(x, ...)
"as.cell_limits"(x, ...)
"as.cell_limits"(x, fo = NULL, ...)

Arguments

vector identifying upper left cell of target rectangle

vector identifying lower right cell of target rectangle

sheet

string containing worksheet name, optional

input to convert into a cell_limits object

...

further arguments passed to or from other methods

either "R1C1" (the default) or "A1" specifying the cell reference format; in many contexts, it can be inferred and is optional

Value

a cell_limits object

Details

ul vector specifying upper left cell of target rectangle, of the form c(ROW_MIN, COL_MIN)
lr vector specifying lower right cell of target rectangle, of the form c(ROW_MAX, COL_MAX)
sheet string specifying worksheet name, which may be NA, meaning it's unspecified

A value of NA in ul or lr means the corresponding limit is left unspecified. Therefore a verbose way to specify no limits at all would be cell_limits(c(NA, NA), c(NA, NA)). If the maximum row or column is specified but the associated minimum is not, then the minimum is set to 1.

When specified via character, cell references can be given in A1 or R1C1 notation and must be interpretable as absolute references. For A1, this means either both row and column are annotated with a dollar sign $ or neither is. So, no mixed references, like B$4. For R1C1, this means no square brackets, like R[-3]C[3].

Examples

Run this code

cell_limits(c(1, 3), c(1, 5))
cell_limits(c(NA, 7), c(3, NA))
cell_limits(c(NA, 7))
cell_limits(lr = c(3, 7))

cell_limits(c(1, 3), c(1, 5), "Sheet1")
cell_limits(c(1, 3), c(1, 5), "Spaces are evil")

dim(as.cell_limits("A1:F10"))

as.cell_limits("A1")
as.cell_limits("$Q$24")
as.cell_limits("A1:D8")
as.cell_limits("R5C11")
as.cell_limits("R2C3:R6C9")
as.cell_limits("Sheet1!R2C3:R6C9")
as.cell_limits("'Spaces are evil'!R2C3:R6C9")

## Not run: 
# ## explicitly mixed A1 references won't work
# as.cell_limits("A$2")
# ## mixed or relative R1C1 references won't work
# as.cell_limits("RC[4]")
# ## End(Not run)

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