as.ra_ref: Convert to a ra_ref object

In cellranger: Translate Spreadsheet Cell Ranges to Rows and Columns

Description

Convert various representations of a cell reference into an object of class ra_ref.

• as.ra_ref is NOT vectorized and therefore requires the input to represent exactly one cell, i.e. be of length 1.

• as.ra_ref_v accepts input of length >= 1 and returns a list of ra_ref objects.

Usage

as.ra_ref(x, ...)

as.ra_ref_v(x, ...)

## S3 method for class 'character'
as.ra_ref(x, fo = NULL, strict = TRUE, ...)

## S3 method for class 'character'
as.ra_ref_v(x, fo = NULL, strict = TRUE, ...)

## S3 method for class 'cell_addr'
as.ra_ref(x, ...)

## S3 method for class 'cell_addr'
as.ra_ref_v(x, ...)

Arguments

x	one or more cell references, as a character vector or cell_addr object
...	further arguments passed to or from other methods
fo	either "R1C1" (the default) or "A1" specifying the cell reference format; in many contexts, it can be inferred and is optional
strict	logical, affects reading and writing of A1 formatted cell references. When strict = TRUE, references must be declared absolute through the use of dollar signs, e.g., $A$1, for parsing. When making a string, strict = TRUE requests dollar signs for absolute reference. When strict = FALSE, pure relative reference strings will be interpreted as absolute, i.e. A1 and $A$1 are treated the same. When making a string, strict = FALSE will cause dollars signs to be omitted in the reference string.

Value

a ra_ref object, in the case of as.ra_ref, or a list of them, in the case of as.ra_ref_v

Examples

## as.ra_ref.character()
as.ra_ref("$F$2")
as.ra_ref("R[-4]C3")
as.ra_ref("B4")
as.ra_ref("B4", strict = FALSE)
as.ra_ref("B$4")

## this is actually ambiguous! is format A1 or R1C1 format?
as.ra_ref("RC2")
## format could be specified in this case
as.ra_ref("RC2", fo = "R1C1")
as.ra_ref("RC2", fo = "A1", strict = FALSE)

## as.ra_ref_v.character()
cs <- c("$A$1", "Sheet1!$F$14", "Sheet2!B$4", "D9")
## Not run: 
## won't work because as.ra_ref requires length one input
as.ra_ref(cs)

## End(Not run)
## use as.ra_ref_v instead
as.ra_ref_v(cs, strict = FALSE)
## as.ra_ref.cell_addr
ca <- cell_addr(2, 5)
as.ra_ref(ca)
## as.ra_ref_v.cell_addr()

ca <- cell_addr(1:3, 1)
## Not run: 
## won't work because as.ra_ref methods not natively vectorized
as.ra_ref(ca)

## End(Not run)
## use as.ra_ref_v instead
as.ra_ref_v(ca)

cellranger documentation built on May 2, 2019, 11:26 a.m.