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- def triangle(length, amplitude):
- section = length // 4
- for direction in (1, -1):
- for i in range(section):
- yield i * (amplitude / section) * direction
- for i in range(section):
- yield (amplitude - (i * (amplitude / section))) * direction
- >>> list(triangle(100, 0.5))
- [0.0, 0.02, 0.04, 0.06, 0.08, 0.1, 0.12, 0.14, 0.16, 0.18, 0.2, 0.22, 0.24, 0.26, 0.28, 0.3, 0.32, 0.34, 0.36, 0.38, 0.4, 0.42, 0.44, 0.46, 0.48, 0.5, 0.48, 0.46, 0.44, 0.42, 0.4, 0.38, 0.36, 0.33999999999999997, 0.32, 0.3, 0.28, 0.26, 0.24, 0.21999999999999997, 0.2, 0.18, 0.15999999999999998, 0.14, 0.12, 0.09999999999999998, 0.08000000000000002, 0.06, 0.03999999999999998, 0.020000000000000018, -0.0, -0.02, -0.04, -0.06, -0.08, -0.1, -0.12, -0.14, -0.16, -0.18, -0.2, -0.22, -0.24, -0.26, -0.28, -0.3, -0.32, -0.34, -0.36, -0.38, -0.4, -0.42, -0.44, -0.46, -0.48, -0.5, -0.48, -0.46, -0.44, -0.42, -0.4, -0.38, -0.36, -0.33999999999999997, -0.32, -0.3, -0.28, -0.26, -0.24, -0.21999999999999997, -0.2, -0.18, -0.15999999999999998, -0.14, -0.12, -0.09999999999999998, -0.08000000000000002, -0.06, -0.03999999999999998, -0.020000000000000018]
- def triangle2(length, amplitude):
- section = length // 4
- x = np.linspace(0, amplitude, section+1)
- mx = -x
- return np.r_[x, x[-2::-1], mx[1:], mx[-2:0:-1]]
- import numpy
- def trigen(n, amp):
- y = 0
- x = 0
- s = amp / (n/4)
- while x < n:
- yield y
- y += s
- if abs(y) > amp:
- s *= -1
- x += 1
- a = numpy.fromiter(trigen(100, 0.5), "d")
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