How can I remove the first element of a xarray.DataArray?

Question

I have a xarray.DataArray:

array([  5.437614e+01,   2.090367e+02,   3.687384e+02, ...,   5.121467e-02,
         5.116013e-02,   5.110552e-02])
Coordinates:
  * time     (time) datetime64[ns] 1999-12-01 2010-06-01T06:00:00 ...

I found several answers for lists, but I am not able to do it for an array.

Tried

a1.pop[0]

AttributeError: 'DataArray' object has no attribute 'pop'

This kind of array? https://docs.python.org/3/library/array.html If so: https://docs.python.org/3/library/array.html#array.array.pop — Felix Kling, Oct 27 '17 at 21:29
Well, `xarray.DataArray` is not what I linked to so you cannot expect that API to work. That's why I asked you to clarify what you are using. — Felix Kling, Oct 27 '17 at 21:32
Anyway, it should have been `a1.pop(0)`. I suspect `a1 = a1[1:]` will work. — juanpa.arrivillaga, Oct 27 '17 at 21:34
Please provide the *full* [Minimal, complete, verifiable example](http://stackoverflow.com/help/mcve). We should be able to paste your posted code into a text file and reproduce the problem you described. — Prune, Oct 27 '17 at 21:35

developer_hatch · Accepted Answer · 2017-10-27T21:45:21.977

2

try a1 = a1[1:] because that should work perfectly

edited Oct 27 '17 at 21:45

answered Oct 27 '17 at 21:38

developer_hatch

15,898
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Tried with python3 and xarray.DataArray and indeed **it does work** – Ken Schumack Oct 27 '17 at 22:10

Chipsvernichter · Answer 2 · 2017-10-27T21:42:47.050

0

Try other brackets (the round ones):

a1.pop(0)

Edit: I found the second answer very useful, but it's about list since there are no arrays in Python?

Remove object from a list of objects in python

edited Oct 27 '17 at 21:42

answered Oct 27 '17 at 21:34

Chipsvernichter

62
1
9

That won't work either. `pop` doesn't exist: `AttributeError: 'DataArray' object has no attribute 'pop'` – Felix Kling Oct 27 '17 at 21:35
I'm not the person who asked the question, so no. I just pointed out that your answer cannot work. – Felix Kling Oct 27 '17 at 21:37
@Chipsvernichter the question isn't *about `list` objects*, it is about `xarray.DataArray` objects. – juanpa.arrivillaga Oct 27 '17 at 21:37

How can I remove the first element of a xarray.DataArray?

Tried

2 Answers2