UNPKG

@stdlib/math-base-special-sinc

Version:

Compute the normalized cardinal sine of a number.

49 lines (43 loc) 1.05 kB
/* * @license Apache-2.0 * * Copyright (c) 2019 The Stdlib Authors. * * 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 * * 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. */ // TypeScript Version: 4.1 /** * Computes the normalized cardinal sine of a number. * * @param x - input value * @returns cardinal sine * * @example * var v = sinc( 0.5 ); * // returns ~0.637 * * @example * var v = sinc( -1.2 ); * // returns ~-0.156 * * @example * var v = sinc( 0.0 ); * // returns 1.0 * * @example * var v = sinc( NaN ); * // returns NaN */ declare function sinc( x: number ): number; // EXPORTS // export = sinc;