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Create a zero-column or zero-row gtable with the given heights or widths respectively.
gtable_row_spacer(widths)gtable_col_spacer(heights)
gtable_col_spacer(heights)
A gtable object
unit vector of widths
unit vector of heights
Other gtable construction: gtable_col(), gtable_matrix(), gtable_row(), gtable()
gtable_col()
gtable_matrix()
gtable_row()
gtable()