问Pearson相关零值

EN

我在计算皮尔逊相关性。最后，我的结果(correlation1)如下所示。我想知道为什么在correlation1中所有的第二个系数都有0.0。有人能解释吗？此外，我的相关代码工作缓慢。我怎么能跑得快？

结果(抽样)：

(0.52543523179249552, 0.0), (0.52543905756911169, 0.0), (0.52544196572206603, 0.0), (0.52545010637443945, 0.0)...

from scipy.stats import pearsonr

s1_list = []
s2_list = []
s3_list = []
s4_list = []

zip_list1 = []
zip_list2 = []

correlation1 = []
for x, y in zip(speed1_list, speed2_list):
    zip1 = {"s1": float(x), "s2": float(y)}
    s1_list.append(zip1["s1"])
    s2_list.append(zip1["s2"])
    zip_list1.append(zip1)
    correlation1.append(pearsonr(s1_list,s2_list))

print correlation1

投入：

speed1_list：[113.0, 116.0, 120.0, 120.0, 117.0, 127.0, 124.0, 118.0, 124.0, 128.0, 128.0, 125.0, 112.0, 122.0, 125.0, 133.0, 128.0, 129.0, 126.0, 123.0, 120.0, 118.0, 114.0, 119.0, 129.0, 127.0, 128.0, 122.0, 120.0, 125.0, 119.0...]

speed2_list：[125.0, 123.0, 120.0, 115.0, 124.0, 120.0, 120.0, 119.0, 119.0, 122.0, 121.0, 116.0, 116.0, 119.0, 116.0, 113.0, 113.0, 115.0, 120.0, 122.0, 122.0, 113.0, 118.0, 121.0, 120.0, 119.0, 116.0...]

correlation1：(0.52543523179249552, 0.0), (0.52543905756911169, 0.0), (0.52544196572206603, 0.0), (0.52545010637443945, 0.0)...