Class for HDF5 compound datatypes.

Inherits from classH5T.

Value

Object of classH5T_COMPOUND.

Methods

new(labels, dtypes, size = NULL, offset = NULL, id = NULL)

Create at compound type that is the HDF5 equivalent of a table

Parameters

labels

The labels of the columns of the compound object

dtypes

The datatypes of the columns of the object; this is usually a list of objectsof classH5T

size

The size of each datatype; ifNULL, automatically inferred

offset

The offset where each datatype starts; can be different from the sum of the individual sizesso that datatypes are aligned with memory addresses. IfNULL, inferred automatically

id

Internal use only

pack()

This function implements the HDF5-API function H5Tpack.Please see the documentation athttps://docs.hdfgroup.org/hdf5/v1_10/group___h5_t.html for details.

get_cpd_types()

ReturnH5T objects that represent the datatypes of the columns of thecompound object. Returned as a list if more than 1

get_cpd_labels()

Return the labels of the columns as a character vector

get_cpd_classes()

Return the classes of the columns as an object of typefactor_ext

get_cpd_offsets()

Return the offsets of the datatypes

describe()

Print a detailed description of the datatype; this is experimental

See also

Author

Holger Hoefling

Examples

# create a H5T_COMPOUND  corresponding to a data-framemy_cpd<-H5T_COMPOUND$new(c("name","age","salary"),    dtypes=list(H5T_STRING$new(size=200),h5types$H5T_NATIVE_INT,h5types$H5T_NATIVE_DOUBLE))my_cpd#> Class: H5T_COMPOUND#> Datatype: H5T_COMPOUND {#>       H5T_STRING {#>          STRSIZE 200;#>          STRPAD H5T_STR_NULLTERM;#>          CSET H5T_CSET_ASCII;#>          CTYPE H5T_C_S1;#>       } "name" : 0;#>       H5T_STD_I32LE "age" : 200;#>       H5T_IEEE_F64LE "salary" : 204;#>    }