Open a Zarr-backed Daf store. — zarr

Path-aware constructor that picks the right backing store. A path ending in .daf.zarr (or any directory path) creates a DirStore. :memory: or NULL creates a DictStore. A path ending in .daf.zarr.zip creates an MmapZipStore (mmap-backed zip).

Usage

zarr_daf(uri = NULL, mode = c("r", "r+", "w", "w+"), name = NULL)

Arguments

uri: Filesystem directory path, :memory:, or NULL.
mode: "r", "r+", "w", or "w+". "w" initializes a fresh empty store (creating the directory if needed). "w+" truncates any existing store and creates a fresh one. "r+" opens for read-write without truncating. "r" opens read-only.
name: Optional name; default derived from uri.

Value

A ZarrDaf (writeable) or ZarrDafReadOnly.

Examples

tmp <- tempfile(fileext = ".daf.zarr")
d <- zarr_daf(tmp, mode = "w")
add_axis(d, "cell", c("c1", "c2"))