Split list into array in python

Question

I have a problem to split array into array, here the source code and the output,

import numpy as np

s = np.array([[100], [200], [300], [400], [500]])
mean = np.mean(s)
stdev = s.std()
for i in range(len(s)):
    z = ((s[i]-mean)/stdev)
    print z

out :

[-1.41421356]
[-0.70710678]
[ 0.]
[ 0.70710678]
[ 1.41421356]

I want the output like this :

[[-1.41421356]
[-0.70710678]
[ 0.]
[ 0.70710678]
[ 1.41421356]]

Avinash Raj · Accepted Answer · 2015-03-28 04:13:28Z

1

Create an empty list and then append the results to that empty list.

import numpy as np
s = np.array([[100], [200], [300], [400], [500]])
mean = np.mean(s)
stdev = s.std()
x = []
for i in range(len(s)):
    x.append(((s[i]-mean)/stdev))
print np.array(x)

edited Mar 28, 2015 at 4:13

answered Mar 28, 2015 at 4:07

Avinash Raj

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1 Comment

Majesty Eksa Permana Over a year ago

Thx for your answer Avinash Raj, :)

splucena · Accepted Answer · 2015-03-28 04:10:09Z

0

try this

...
...
z = []

for i in range(len(s)):

    z.append((s[i]-mean)/stdev)

print z

answered Mar 28, 2015 at 4:10

splucena

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