I have an array of numbers. For example:
a = (1,2,3,4,5,6)
Now I need to create another two array from a based on some criteria. Say x array of even number numbers and y array of odd numbers.
I have done that. But the next thing is, I want to publish them as below:
z x y
1 1
2 2
3 3
4 4
5 5
6 6
I dont know how to print the void places as I have already created x and y array from z. Any help?
The way to print a large space is to insert a tab. This is simply done by printing "\t" which represents a tab character.
This code does it:
a = (1, 2, 3, 4, 5, 6)
print "z\tx\ty" # Print top line separated by tab characters
for i in a: # For each element in the list
if i % 2 == 0: # If the element is even
print i, "\t", i
else: # If it is odd
print i, "\t\t", i
Output:
z x y
1 1
2 2
3 3
4 4
5 5
6 6
You can use a simple indexing :
>>> a =np.array([1,2,3,4,5,6])
>>> x,y=a[0::2],a[1::2]
>>> x
array([1, 3, 5])
>>> y
array([2, 4, 6])
Or as a more general way to applying a condition on your array you can use np.where :
>>> np.where(a%2!=0)[0]
array([0, 2, 4])
>>>
>>> np.where(a%2==0)[0]
array([1, 3, 5])
You can use following code
a = (3, 2, 3, 4, 5, 6)
print "z\tx\ty"
for i,e in enumerate(a):
print i, "\t"*(i%2+1), e
This is a shorter version of solution proposed by Red Shift.
