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/*
* 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.spark.ml.linalg
import breeze.linalg.{DenseVector => BDV, SparseVector => BSV}
import org.apache.spark.ml.SparkMLFunSuite
/**
* Test Breeze vector conversions.
*/
class BreezeVectorConversionSuite extends SparkMLFunSuite {
val arr = Array(0.1, 0.2, 0.3, 0.4)
val n = 20
val indices = Array(0, 3, 5, 10, 13)
val values = Array(0.1, 0.5, 0.3, -0.8, -1.0)
test("dense to breeze") {
val vec = Vectors.dense(arr)
assert(vec.toBreeze === new BDV[Double](arr))
}
test("sparse to breeze") {
val vec = Vectors.sparse(n, indices, values)
assert(vec.toBreeze === new BSV[Double](indices, values, n))
}
test("dense breeze to vector") {
val breeze = new BDV[Double](arr)
val vec = Vectors.fromBreeze(breeze).asInstanceOf[DenseVector]
assert(vec.size === arr.length)
assert(vec.values.eq(arr), "should not copy data")
}
test("sparse breeze to vector") {
val breeze = new BSV[Double](indices, values, n)
val vec = Vectors.fromBreeze(breeze).asInstanceOf[SparseVector]
assert(vec.size === n)
assert(vec.indices.eq(indices), "should not copy data")
assert(vec.values.eq(values), "should not copy data")
}
test("sparse breeze with partially-used arrays to vector") {
val activeSize = 3
val breeze = new BSV[Double](indices, values, activeSize, n)
val vec = Vectors.fromBreeze(breeze).asInstanceOf[SparseVector]
assert(vec.size === n)
assert(vec.indices === indices.slice(0, activeSize))
assert(vec.values === values.slice(0, activeSize))
}
}
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