Visible to Intel only — GUID: GUID-3FC22E71-C8DF-418D-AD12-E7101F7E3751
Visible to Intel only — GUID: GUID-3FC22E71-C8DF-418D-AD12-E7101F7E3751
CSV data source
Refer to Developer Guide: CSV data source.
Programming Interface
All types and functions in this section are declared in the oneapi::dal::csv namespace and be available via inclusion of the oneapi/dal/io/csv.hpp header file.
enum class read_options : std::uint64_t {
none = 0,
parse_header = 1 << 0
};
constexpr char default_delimiter = ',';
constexpr read_options default_read_options = read_options::none;
class data_source {
public:
data_source(const char *file_name,
char delimiter = default_delimiter,
read_options opts = default_read_options);
data_source(const std::string &file_name,
char delimiter = default_delimiter,
read_options opts = default_read_options);
std::string get_file_name() const;
char get_delimiter() const;
read_options get_read_options() const;
};
classdata_source
data_source(constchar*file_name, chardelimiter=default_delimiter, read_optionsopts=default_read_options)
Creates a new instance of a CSV data source with the given file_name, delimiter and read options opts flag.
data_source(conststd::string&file_name, chardelimiter=default_delimiter, read_optionsopts=default_read_options)
Creates a new instance of a CSV data source with the given file_name, delimiter and read options opts flag.
std::stringfile_name=""
A string that contains the name of the file with the dataset to read.
- Getter
-
std::string get_filename() const
chardelimiter=default_delimiter
A character that represents the delimiter between separate features in the input file.
- Getter
-
char get_delimter() const
read_optionsoptions=default_read_options
Value that stores read options to be applied during reading of the input file. Enabled parse_header option indicates that the first line in the input file is processed as a header record with features names.
- Getter
-
read_options get_read_options() const
Reading oneapi::dal::read<Object>(...)
Args
template <typename Object>
class read_args {
public:
read_args();
};
template<typenameObject>classread_args
read_args()
Creates args for the read operation with the default attribute values.
Operation
oneapi::dal::table is the only supported value of the Object template parameter for read operation with CSV data source.
template<typenameObject,typenameDataSource>Objectread(constDataSource&ds)
- Template Parameters
-
Object – oneDAL object type that is produced as a result of reading from the data source.
DataSource – CSV data source csv::data_source.
Usage Example
using namespace oneapi;
const auto data_source = dal::csv::data_source("data.csv", ',');
const auto table = dal::read<dal::table>(data_source);