ax.bar edgecolor fails for scalar color?

Hi,

I've been working through Ben Root's excellent Anatomy of Matplotlib
tutorial at https://github.com/matplotlib/AnatomyOfMatplotlib/.

In the course of this (exercise 2.1 in particular), I've noticed that
the `edgecolor` argument to `ax.bar(...)` doesn't work as advertised:

> edgecolor : scalar or array-like, optional
> the colors of the bar edges

However, it doesn't seem to work as a scalar: in that case it only
applies to the first bar; instead you need to supply `(color,)*len(x)`
or similar.

It fails the same way whether or not we use something like
`plt.style.use('classic')` or `mpl.rcParams['patch.force_edgecolor'] = True`

Is this a bug, something weird in my setup, or am I missing something?

Andrew

Yeah, I think we ran into that during the live tutorial. IIRC, the `color`
keyword argument was overriding the `edgecolor` keyword argument.

···

On Tue, Oct 10, 2017 at 10:40 AM, Andrew Jaffe <a.h.jaffe at gmail.com> wrote:

Hi,

I've been working through Ben Root's excellent Anatomy of Matplotlib
tutorial at https://github.com/matplotlib/AnatomyOfMatplotlib/.

In the course of this (exercise 2.1 in particular), I've noticed that the
`edgecolor` argument to `ax.bar(...)` doesn't work as advertised:

> edgecolor : scalar or array-like, optional
> the colors of the bar edges

However, it doesn't seem to work as a scalar: in that case it only applies
to the first bar; instead you need to supply `(color,)*len(x)` or similar.

It fails the same way whether or not we use something like
`plt.style.use('classic')` or `mpl.rcParams['patch.force_edgecolor'] =
True`

Is this a bug, something weird in my setup, or am I missing something?

Andrew

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Actually, to be honest, I can't remember what the solution was. CC'ing
Thomas because I think he figured it out later on during the tutorial.

Ben

···

On Tue, Oct 10, 2017 at 10:50 AM, Benjamin Root <ben.v.root at gmail.com> wrote:

Yeah, I think we ran into that during the live tutorial. IIRC, the `color`
keyword argument was overriding the `edgecolor` keyword argument.

On Tue, Oct 10, 2017 at 10:40 AM, Andrew Jaffe <a.h.jaffe at gmail.com> > wrote:

Hi,

I've been working through Ben Root's excellent Anatomy of Matplotlib
tutorial at https://github.com/matplotlib/AnatomyOfMatplotlib/.

In the course of this (exercise 2.1 in particular), I've noticed that the
`edgecolor` argument to `ax.bar(...)` doesn't work as advertised:

> edgecolor : scalar or array-like, optional
> the colors of the bar edges

However, it doesn't seem to work as a scalar: in that case it only
applies to the first bar; instead you need to supply `(color,)*len(x)` or
similar.

It fails the same way whether or not we use something like
`plt.style.use('classic')` or `mpl.rcParams['patch.force_edgecolor'] =
True`

Is this a bug, something weird in my setup, or am I missing something?

Andrew

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Matplotlib-users mailing list
Matplotlib-users at python.org
https://mail.python.org/mailman/listinfo/matplotlib-users

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