subset-tiledb_array-ANY-ANY-ANY-method: Sets a tiledb array value or value range

In tiledb: Universal Storage Engine for Sparse and Dense Multidimensional Arrays

Sets a tiledb array value or value range

Description

This function assigns a right-hand side object, typically a data.frame or something that can be coerced to a data.frame, to a tiledb array.

Usage

## S4 replacement method for signature 'tiledb_array,ANY,ANY,ANY'
x[i, j, ...] <- value

Arguments

x	sparse or dense TileDB array object
i	parameter row index
j	parameter column index
...	Extra parameter for method signature, currently unused.
value	The value being assigned

Details

For sparse matrices, row and column indices can either be supplied as part of the left-hand side object, or as part of the data.frame provided approrpiate column names.

This function may still still change; the current implementation should be considered as an initial draft.

Value

The modified object

Examples

## Not run: 
uri <- "quickstart_sparse"      ## as created by the other example
arr <- tiledb_array(uri)        ## open array
df <- arr[]                     ## read current content
## First approach: matching data.frame with appriate row and column
newdf <- data.frame(rows=c(1,2,2), cols=c(1,3,4), a=df$a+100)
## Second approach: supply indices explicitly
arr[c(1,2), c(1,3)] <- c(42,43) ## two values
arr[2, 4] <- 88                 ## or just one

## End(Not run)

tiledb documentation built on Sept. 27, 2023, 9:06 a.m.