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for i in range(0, len(arr)):
if arr[i] > 0:
results[0]+=1
elif arr[i] < 0:
results[1]+=1
else:
results[2]+=1
for n in results:
print('{0:.6f}'.format(n/len(arr)))
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Plus Minus
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a little shorter in python
def plusMinus(arr): results = [0]*3