h5_dim: Get Dimensions of an HDF5 Object or Attribute
In h5lite: Simplified 'HDF5' Interface

h5_dim

R Documentation

Get Dimensions of an HDF5 Object or Attribute

Description

Returns the dimensions of a dataset or an attribute as an integer vector. These dimensions match the R-style (column-major) interpretation.

Usage

h5_dim(file, name, attr = NULL)

Arguments

`file`	The path to the HDF5 file.
`name`	Name of the dataset or object.
`attr`	The name of an attribute to check. If `NULL` (default), the function returns the dimensions of the object itself.

Value

An numeric vector of dimensions, or numeric(0) for scalars.

Examples

file <- tempfile(fileext = ".h5")

h5_write(matrix(1:10, 2, 5), file, "matrix")
h5_dim(file, "matrix") # 2 5

h5_write(mtcars, file, "mtcars")
h5_dim(file, "mtcars") # 32 11

h5_write(I(TRUE), file, "my_bool")
h5_dim(file, "my_bool") # numeric(0)

h5_write(1:10, file, "my_ints")
h5_dim(file, "my_ints") # 10

unlink(file)

h5lite documentation built on May 19, 2026, 1:07 a.m.