Axes array for subplots

?Virgil,

What is ax in your example? When I do
fig,axarr = plt.subplots(1,squeeze=False,sharex=True)
I get axarr is an array of shape (1,1). An array does not have an
attribute grid.

Jon
?

···

Date: Tue, 17 Apr 2018 17:14:28 +0200
From: Virgil Stokes <vs at it.uu.se>
To: Benjamin Root <ben.v.root at gmail.com>,
        <matplotlib-users at python.org>
Subject: Re: [Matplotlib-users] Axes array for subplots
Message-ID: <951bcfd1-e953-17e3-9350-caec6231ab00 at it.uu.se>
Content-Type: text/plain; charset="utf-8"; Format="flowed"

Ok Ben,

I tried the following per your suggestion:

fig, axarr = plt.subplots(NSub, figsize=(width,height), squeeze=False,
sharex=True)

but when the following is executed:

? ax.grid(True)

I get the following error message:
? builtins.AttributeError: 'numpy.ndarray' object has no attribute 'grid'

But, thanks for your help :-).

On 2018-04-17 16:30, Benjamin Root wrote:
> By default, `squeeze` is called on the array prior to returning it.
> This way, users don't need to deal with 2D arrays when most of the
> time, they are dealing with 1D setups. You can specify squeeze=False
> to subplots to turn this behavior off and always have a 2D array.
>
> I hope that helps!
> Ben Root
>
>
> On Tue, Apr 17, 2018 at 10:12 AM, Virgil Stokes <vs at it.uu.se > > <mailto:vs at it.uu.se>> wrote:
>
> The following line is part of a much larger python (3.6) with
> Matplotlib (2.2.2) program in which the number of subplots is
> determined from input data:
>
> fig, axarr = plt.subplots(NSub, figsize=(width,height), sharex=True)
>
> This works fine when the number of subplots (NSub) is greater than
> 1. For example when NSub=3, axarr is an array of length 3 and
> contains:
>
> array([<matplotlib.axes._subplots.AxesSubplot object at
> 0x0000025900E9DDD8>,
> ??? <matplotlib.axes._subplots.AxesSubplot object at
> 0x00000259011897F0>,
> ??? <matplotlib.axes._subplots.AxesSubplot object at
> 0x00000259011C7128>],
> ??? dtype=object)
>
> However, when NSub=1, axarr contains:
>
> <matplotlib.axes._subplots.AxesSubplot object at 0x00000161AB26AE80>
>
> and of course, will give an error if axarr is an array; i.e.
>
> builtins.TypeError: 'AxesSubplot' object does not support indexing
>
> For my code this requires special handling because axarr is no
> longer an array. Why not have axarr contain:
>
> array([<matplotlib.axes._subplots.AxesSubplot object at
> 0x00000161AB26AE80>],dtype=object)
>
> when NSub=1. IMHO this is consistent; i.e. it is an array with a
> length that is equal to the number of subplots.
>
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