Rachie - 1 year ago 47

Python Question

I'm trying to set up data to convert to a numpy array. I have three lists. Two are one dimensional, and one is two dimensional.

`a = [1,2,3]`

b = [4,5,6]

c = [ [7,8],[9,10],[11,12] ]

I want to end up with this:

`[ [1,4,7,8],[2,5,9,10],[3,6,11,12] ]`

I've tried using

`zip()`

Answer

Assuming you don't mind if the use of NumPy in the conversion itself, the following should work.

```
from numpy import array
a = array([1, 2, 3])
b = array([4, 5, 6])
c = array([[7, 8], [9, 10], [11, 12]])
result = array(list(zip(a, b, c[:, 0], c[:, 1])))
```

Note that `c[:, n]`

will only work with NumPy arrays, not standard Python lists.

Source (Stackoverflow)