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lib/AI/XGBoost/CAPI/RAW.pm  view on Meta::CPAN

All functions in this file will return 0 when success
and -1 when an error occurred,
XGBGetLastError can be called to retrieve the error

This function is thread safe and can be called by different thread

Returns string error information

=head2 XGDMatrixCreateFromFile

Load a data matrix

Parameters:

=over 4

=item filename

the name of the file

=item silent 

whether print messages during loading

=item out 

a loaded data matrix

=back

=head2 XGDMatrixCreateFromCSREx

Create a matrix content from CSR fromat

Parameters:

=over 4

=item indptr

pointer to row headers

=item indices

findex

=item data

fvalue

=item nindptr

number of rows in the matrix + 1

=item nelem

number of nonzero elements in the matrix

=item num_col

number of columns; when it's set to 0, then guess from data

=item out

created dmatrix

=back

=head2 XGDMatrixCreateFromCSCEx

Create a matrix content from CSC format

Parameters:

=over 4

=item col_ptr

pointer to col headers

=item indices

findex

=item data

fvalue

=item nindptr

number of rows in the matrix + 1

=item nelem

number of nonzero elements in the matrix

=item num_row

number of rows; when it's set to 0, then guess from data

=back

=head2 XGDMatrixCreateFromMat

Create matrix content from dense matrix

Parameters:

=over 4

=item data 

pointer to the data space

=item nrow

number of rows

=item ncol

number columns

=item missing

which value to represent missing value

=item out

created dmatrix

=back

=head2 XGDMatrixCreateFromMat_omp

Create matrix content from dense matrix

Parameters:

=over 4

=item data 

pointer to the data space

=item nrow

number of rows

=item ncol

number columns

=item missing

which value to represent missing value

=item out

created dmatrix