How can you convert an array([]) object, into an array([[]]) object?

Question

I'm trying to convert

array([0, 1, 2, 3, 4, 5])

to

array([[0,1,2,3,4,5]])

But I can't find any information online. Are there a any solution to this?

It doesn't seem to be working, I used np.array() to wrap it but it just left me with what I had previously — The Digital Odyssey
– The Digital Odyssey, Commented Oct 9, 2019 at 20:11
You want either np.expand_dims(a, 0) or a[None], or maybe np.atleast_2d(a) if you want to handle scalars and arrays that already are 2D — user3483203
– user3483203, Commented Oct 9, 2019 at 20:12
reshape(arr, (1,5)) is also useful. Look at the shape of the desired array — hpaulj
– hpaulj, Commented Oct 9, 2019 at 20:51

Mr_U4913 · Accepted Answer · 2019-10-09 20:09:57Z

1

a = np.array([1,2,3,4,5])
a[None]

answered Oct 9, 2019 at 20:09

Mr_U4913

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Mr_U4913 Over a year ago

docs.scipy.org/doc/numpy/reference/arrays.indexing.html

The newaxis object can be used in all slicing operations to create an axis of length one. newaxis is an alias for ‘None’, and ‘None’ can be used in place of this with the same result.

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