| |
| /* ---------------------------------------------------------------------- |
| * Project: CMSIS DSP Library |
| * Title: arm_russellrao_distance.c |
| * Description: Russell-Rao distance between two vectors |
| * |
| * $Date: 23 April 2021 |
| * $Revision: V1.9.0 |
| * |
| * Target Processor: Cortex-M and Cortex-A cores |
| * -------------------------------------------------------------------- */ |
| /* |
| * Copyright (C) 2010-2021 ARM Limited or its affiliates. All rights reserved. |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * Licensed 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 |
| * |
| * 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. |
| */ |
| |
| #include "dsp/distance_functions.h" |
| #include <limits.h> |
| #include <math.h> |
| |
| |
| |
| extern void arm_boolean_distance_TT(const uint32_t *pA |
| , const uint32_t *pB |
| , uint32_t numberOfBools |
| , uint32_t *cTT |
| ); |
| |
| |
| /** |
| @addtogroup BoolDist |
| @{ |
| */ |
| |
| /** |
| * @brief Russell-Rao distance between two vectors |
| * |
| * @param[in] pA First vector of packed booleans |
| * @param[in] pB Second vector of packed booleans |
| * @param[in] numberOfBools Number of booleans |
| * @return distance |
| * |
| */ |
| |
| float32_t arm_russellrao_distance(const uint32_t *pA, const uint32_t *pB, uint32_t numberOfBools) |
| { |
| uint32_t ctt=0; |
| |
| |
| arm_boolean_distance_TT(pA, pB, numberOfBools, &ctt); |
| |
| |
| return(1.0f*(numberOfBools - ctt) / ((float32_t)numberOfBools)); |
| } |
| |
| |
| /** |
| * @} end of BoolDist group |
| */ |