1 /* ----------------------------------------------------------------------
2 * Project: CMSIS DSP Library
3 * Title: arm_std_f64.c
4 * Description: Standard deviation of the elements of a floating-point vector
5 *
6 * $Date: 13 September 2021
7 * $Revision: V1.10.0
8 *
9 * Target Processor: Cortex-M and Cortex-A cores
10 * -------------------------------------------------------------------- */
11 /*
12 * Copyright (C) 2010-2021 ARM Limited or its affiliates. All rights reserved.
13 *
14 * SPDX-License-Identifier: Apache-2.0
15 *
16 * Licensed under the Apache License, Version 2.0 (the License); you may
17 * not use this file except in compliance with the License.
18 * You may obtain a copy of the License at
19 *
20 * www.apache.org/licenses/LICENSE-2.0
21 *
22 * Unless required by applicable law or agreed to in writing, software
23 * distributed under the License is distributed on an AS IS BASIS, WITHOUT
24 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
25 * See the License for the specific language governing permissions and
26 * limitations under the License.
27 */
28
29 #include "dsp/statistics_functions.h"
30
31 /**
32 @ingroup groupStats
33 */
34
35 /**
36 @addtogroup STD
37 @{
38 */
39
40 /**
41 @brief Standard deviation of the elements of a floating-point vector.
42 @param[in] pSrc points to the input vector
43 @param[in] blockSize number of samples in input vector
44 @param[out] pResult standard deviation value returned here
45 */
arm_std_f64(const float64_t * pSrc,uint32_t blockSize,float64_t * pResult)46 ARM_DSP_ATTRIBUTE void arm_std_f64(
47 const float64_t * pSrc,
48 uint32_t blockSize,
49 float64_t * pResult)
50 {
51 float64_t var;
52 arm_var_f64(pSrc,blockSize,&var);
53 *pResult = sqrt(var);
54 }
55
56 /**
57 @} end of STD group
58 */
59
