sstdevch.c (1262B)
1 /** 2 * @license Apache-2.0 3 * 4 * Copyright (c) 2020 The Stdlib Authors. 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 #include "stdlib/stats/base/sstdevch.h" 20 #include "stdlib/stats/base/svariancech.h" 21 #include <stdint.h> 22 #include <math.h> 23 24 /** 25 * Computes the standard deviation of a single-precision floating-point strided array using a one-pass trial mean algorithm. 26 * 27 * @param N number of indexed elements 28 * @param correction degrees of freedom adjustment 29 * @param X input array 30 * @param stride stride length 31 * @return output value 32 */ 33 float stdlib_strided_sstdevch( const int64_t N, const float correction, const float *X, const int64_t stride ) { 34 return sqrtf( stdlib_strided_svariancech( N, correction, X, stride ) ); 35 }