# 8th Place Solution(augmentation part)

I'm sharing my worked augmentation part here.
Zebra Mixup
This augmentation worked greatly(+0.001). We called this zebra mixup.
wave_new[:, 0:4096:2] = wave1[:, 0:4096:2]
wave_new[:, 1:4096:2] = wave2[:, 1:4096:2]
Negative Flip
Worked for only negative sample
wave = wave[:, ::-1].copy()
Swap with Other Negative
Negative sample can be switched with other negative
if np.random.uniform() > 0.5:
    wave1[0] = wave2[0]
if np.random.uniform() > 0.5:
    wave1[1] = wave2[1]
if np.random.uniform() > 0.5:
    wave1[2] = wave2[2]
LIGO Swap
Both LIGOs are completely same, so we can swap those.
w0 = wave1[0].copy()
wave1[0] = wave1[1]
wave1[1] = w0