/**
* Appends the given argument frameblock 'that' to this frameblock by creating a deep copy to
* prevent side effects. For cbind, the frames are appended column-wise (same number of rows),
* while for rbind the frames are appended row-wise (same number of columns).
*
* @param that
* @param ret
* @param cbind
* @return
*/
public FrameBlock appendOperations(FrameBlock that, FrameBlock ret, boolean cbind)
throws DMLRuntimeException {
if (cbind) // COLUMN APPEND
{
// sanity check row dimension mismatch
if (getNumRows() != that.getNumRows()) {
throw new DMLRuntimeException(
"Incompatible number of rows for cbind: "
+ that.getNumRows()
+ " (expected: "
+ getNumRows()
+ ")");
}
// allocate output frame
if (ret == null) ret = new FrameBlock();
ret._numRows = _numRows;
// concatenate schemas (w/ deep copy to prevent side effects)
ret._schema = new ArrayList<ValueType>(_schema);
ret._schema.addAll(that._schema);
ret._colnames = new ArrayList<String>(_colnames);
ret._colnames.addAll(that._colnames);
// concatenate column data (w/ deep copy to prevent side effects)
for (Array tmp : _coldata) ret._coldata.add(tmp.clone());
for (Array tmp : that._coldata) ret._coldata.add(tmp.clone());
} else // ROW APPEND
{
// sanity check column dimension mismatch
if (getNumColumns() != that.getNumColumns()) {
throw new DMLRuntimeException(
"Incompatible number of columns for rbind: "
+ that.getNumColumns()
+ " (expected: "
+ getNumColumns()
+ ")");
}
// allocate output frame (incl deep copy schema)
if (ret == null) ret = new FrameBlock();
ret._numRows = _numRows;
ret._schema = new ArrayList<ValueType>(_schema);
ret._colnames = new ArrayList<String>(_colnames);
// concatenate data (deep copy first, append second)
for (Array tmp : _coldata) ret._coldata.add(tmp.clone());
Iterator<Object[]> iter = that.getObjectRowIterator();
while (iter.hasNext()) ret.appendRow(iter.next());
}
return ret;
}
/**
* Right indexing operations to slice a subframe out of this frame block. Note that the existing
* column value types are preserved.
*
* @param rl row lower index, inclusive, 0-based
* @param ru row upper index, inclusive, 0-based
* @param cl column lower index, inclusive, 0-based
* @param cu column upper index, inclusive, 0-based
* @param ret
* @return
*/
public FrameBlock sliceOperations(int rl, int ru, int cl, int cu, FrameBlock ret)
throws DMLRuntimeException {
// check the validity of bounds
if (rl < 0
|| rl >= getNumRows()
|| ru < rl
|| ru >= getNumRows()
|| cl < 0
|| cu >= getNumColumns()
|| cu < cl
|| cu >= getNumColumns()) {
throw new DMLRuntimeException(
"Invalid values for frame indexing: ["
+ (rl + 1)
+ ":"
+ (ru + 1)
+ ","
+ (cl + 1)
+ ":"
+ (cu + 1)
+ "] "
+ "must be within frame dimensions ["
+ getNumRows()
+ ","
+ getNumColumns()
+ "]");
}
// allocate output frame
if (ret == null) ret = new FrameBlock();
ret._numRows = ru - rl + 1;
// copy output schema and colnames
for (int j = cl; j <= cu; j++) {
ret._schema.add(_schema.get(j));
ret._colnames.add(_colnames.get(j));
}
// copy output data
for (int j = cl; j <= cu; j++) ret._coldata.add(_coldata.get(j).slice(rl, ru));
return ret;
}
/**
* @param rhsFrame
* @param rl
* @param ru
* @param cl
* @param cu
* @param ret
* @return
*/
public FrameBlock leftIndexingOperations(
FrameBlock rhsFrame, int rl, int ru, int cl, int cu, FrameBlock ret)
throws DMLRuntimeException {
// check the validity of bounds
if (rl < 0
|| rl >= getNumRows()
|| ru < rl
|| ru >= getNumRows()
|| cl < 0
|| cu >= getNumColumns()
|| cu < cl
|| cu >= getNumColumns()) {
throw new DMLRuntimeException(
"Invalid values for frame indexing: ["
+ (rl + 1)
+ ":"
+ (ru + 1)
+ ","
+ (cl + 1)
+ ":"
+ (cu + 1)
+ "] "
+ "must be within frame dimensions ["
+ getNumRows()
+ ","
+ getNumColumns()
+ "].");
}
if ((ru - rl + 1) < rhsFrame.getNumRows() || (cu - cl + 1) < rhsFrame.getNumColumns()) {
throw new DMLRuntimeException(
"Invalid values for frame indexing: "
+ "dimensions of the source frame ["
+ rhsFrame.getNumRows()
+ "x"
+ rhsFrame.getNumColumns()
+ "] "
+ "do not match the shape of the frame specified by indices ["
+ (rl + 1)
+ ":"
+ (ru + 1)
+ ", "
+ (cl + 1)
+ ":"
+ (cu + 1)
+ "].");
}
// allocate output frame (incl deep copy schema)
if (ret == null) ret = new FrameBlock();
ret._numRows = _numRows;
ret._schema = new ArrayList<ValueType>(_schema);
ret._colnames = new ArrayList<String>(_colnames);
// copy data to output and partial overwrite w/ rhs
for (int j = 0; j < getNumColumns(); j++) {
Array tmp = _coldata.get(j).clone();
if (j >= cl && j <= cu) tmp.set(rl, ru, rhsFrame._coldata.get(j - cl));
ret._coldata.add(tmp);
}
return ret;
}
