read_columns | R Documentation |
ColumnReader
)Read a set of column vector from an input source (e.g. ColumnReader
)
read_columns(x, column_indices)
## S4 method for signature 'ColumnReader,integer'
read_columns(x, column_indices)
x |
the input channel |
column_indices |
the column indices |
a matrix
consisting of the requested column vectors
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