59 lines
1.7 KiB
Swift
59 lines
1.7 KiB
Swift
// Copyright © 2014-2018 the Surge contributors
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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import Foundation
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import PlaygroundSupport
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import Surge
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// MARK: - Arithmetic
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let n = [-1.0, 2.0, 3.0, 4.0, 5.0]
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let sum = Surge.sum(n)
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let a = [1.0, 3.0, 5.0, 7.0]
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let b = [2.0, 4.0, 6.0, 8.0]
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let product = mul(a, b)
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// MARK: - Matrix
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// ⎛ 1 1 ⎞ ⎛ 3 ⎞
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// ⎢ ⎟ * B = ⎢ ⎟ C = ?
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// ⎝ 1 -1 ⎠ ⎝ 1 ⎠
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let A = Matrix([[1, 1], [1, -1]])
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let C = Matrix([[3], [1]])
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let B = inv(A) * C
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// MARK: - FFT
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let count = 64
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let frequency = 4.0
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let amplitude = 3.0
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let x = (0..<count).map { 2.0 * Double.pi / Double(count) * Double($0) * frequency }
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for value in sin(x) {
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value
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}
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for value in fft(sin(x)) {
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value
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}
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