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Open a Daf store by URI or path.

Source: R/open_daf.R
open_daf.Rd

Path/URL-aware factory that dispatches to the right backend. Supported URIs:

  • memory:// (or no path / NULL) — in-memory memory_daf().

  • filesystem directory path — files_daf().

  • *.daf.zarr or *.daf.zarr.zip (filesystem or HTTP) — zarr_daf().

  • any other http(s):// URL — http_daf() (read-only HTTP-served FilesDaf).

Usage

open_daf(uri = NULL, mode = "r", name = NULL, ...)

Arguments

uri

Path or URL. memory:// (or NULL / empty string) for an in-memory store; a filesystem directory path for files_daf; a URL with a recognized scheme for future backends.

mode

One of "r", "r+", "w", "w+". Required for files_daf; ignored for memory_daf.

name

Optional name for the daf object. Default derived from the URI.

...

Reserved for backend-specific options.

Value

A DafReader or DafWriter (subclass depends on backend and mode).

Details

HTTP backends are read-only; modes other than "r" are rejected. HTTP zip-archive URLs are not supported (open the underlying .daf.zarr directory instead).

Examples

d <- open_daf("memory://", name = "demo")
add_axis(d, "cell", c("c1", "c2"))