/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.mahout.h2obindings.ops;
import water.MRTask;
import water.fvec.Frame;
import water.fvec.Vec;
import water.fvec.Chunk;
import org.apache.mahout.h2obindings.drm.H2ODrm;
/**
* R-like cbind like operator, on a DRM and a new column containing
* the given scalar value.
*/
public class CbindScalar {
/**
* Combine the columns of DRM A with a new column storing
* the given scalar.
*
* @param drmA DRM representing matrix A.
* @param d value to be filled in new column.
* @return new DRM containing columns of A and d.
*/
public static H2ODrm exec(H2ODrm drmA, double scalar, boolean leftbind) {
Frame fra = drmA.frame;
Vec newcol = fra.anyVec().makeCon(scalar);
Vec vecs[] = new Vec[fra.vecs().length + 1];
int d = 0;
if (leftbind)
vecs[d++] = newcol;
for (Vec vfra : fra.vecs())
vecs[d++] = vfra;
if (!leftbind)
vecs[d++] = newcol;
return new H2ODrm(new Frame(vecs), drmA.keys);
}
}