Package 'cosmxscan'

Streaming reader over a wide CosMx exprMat CSV (.csv or .csv.gz).

Description

'#[extendr]' is required on the STRUCT as well as on the impl block below. Without it extendr generates no external-pointer conversions and the impl fails to compile with "the trait bound 'CosmxReader: ToVectorValue' is not satisfied" – it falls back to treating the struct as a value to coerce into an R vector. See extendr-api's own altrep_tests.rs: "need to make the object '.into_robj()'-able".

Usage

CosmxReader

Methods

Method 'new'

Open a scanner. '.gz' is detected by extension and inflated inline.

Method 'next_chunk'

Scan up to 'max_rows' data rows, returning their nonzero triplets.

Method 'close'

Release the file handle.

Method 'rows_done'

Data rows consumed so far.

---