public void setMetaData(String varName, long nrows, long ncols) throws DMLRuntimeException {
MatrixObject mo = getMatrixObject(varName);
if (mo.getNumRows() == nrows && mo.getNumColumns() == ncols) return;
MetaData oldMetaData = mo.getMetaData();
if (oldMetaData == null || !(oldMetaData instanceof MatrixFormatMetaData))
throw new DMLRuntimeException("Metadata not available");
MatrixCharacteristics mc =
new MatrixCharacteristics(
(long) nrows,
(long) ncols,
(int) mo.getNumRowsPerBlock(),
(int) mo.getNumColumnsPerBlock());
mo.setMetaData(
new MatrixFormatMetaData(
mc,
((MatrixFormatMetaData) oldMetaData).getOutputInfo(),
((MatrixFormatMetaData) oldMetaData).getInputInfo()));
}
