org.nd4j.linalg.util.NDArrayUtil Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2015-2018 Skymind, Inc.
*
* This program and the accompanying materials are made available under the
* terms of the Apache License, Version 2.0 which is available at
* https://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.
*
* SPDX-License-Identifier: Apache-2.0
******************************************************************************/
package org.nd4j.linalg.util;
import org.nd4j.linalg.api.buffer.DataBuffer;
import org.nd4j.linalg.api.buffer.DataType;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.exception.ND4JIllegalStateException;
import org.nd4j.linalg.factory.Nd4j;
/**
* Created by agibsonccc on 2/26/16.
*/
public class NDArrayUtil {
private NDArrayUtil() {}
public static INDArray toNDArray(int[][] nums) {
if (Nd4j.dataType() == DataType.DOUBLE) {
double[] doubles = ArrayUtil.toDoubles(nums);
INDArray create = Nd4j.create(doubles, new int[] {nums[0].length, nums.length});
return create;
} else {
float[] doubles = ArrayUtil.toFloats(nums);
INDArray create = Nd4j.create(doubles, new int[] {nums[0].length, nums.length});
return create;
}
}
public static INDArray toNDArray(int[] nums) {
if (Nd4j.dataType() == DataType.DOUBLE) {
double[] doubles = ArrayUtil.toDoubles(nums);
INDArray create = Nd4j.create(doubles, new int[] {1, nums.length});
return create;
} else {
float[] doubles = ArrayUtil.toFloats(nums);
INDArray create = Nd4j.create(doubles, new int[] {1, nums.length});
return create;
}
}
public static INDArray toNDArray(long[] nums) {
if (Nd4j.dataType() == DataType.DOUBLE) {
double[] doubles = ArrayUtil.toDoubles(nums);
INDArray create = Nd4j.create(doubles, new int[] {1, nums.length});
return create;
} else {
float[] doubles = ArrayUtil.toFloats(nums);
INDArray create = Nd4j.create(doubles, new int[] {1, nums.length});
return create;
}
}
public static int[] toInts(INDArray n) {
if (n.length() > Integer.MAX_VALUE)
throw new ND4JIllegalStateException("Can't convert INDArray with length > Integer.MAX_VALUE");
n = n.reshape(-1);
int[] ret = new int[(int) n.length()];
for (int i = 0; i < n.length(); i++)
ret[i] = (int) n.getFloat(i);
return ret;
}
public static long[] toLongs(INDArray n) {
if (n.length() > Integer.MAX_VALUE)
throw new ND4JIllegalStateException("Can't convert INDArray with length > Integer.MAX_VALUE");
n = n.reshape(-1);
// FIXME: int cast
long[] ret = new long[(int) n.length()];
for (int i = 0; i < n.length(); i++)
ret[i] = (long) n.getFloat(i);
return ret;
}
}