`alpha` cause facecolor being ignored in `scatter`

[gepcel]

During using scatter, when alpha param is set, facecolor='none' is ignored. eg:

fig,ax=pplt.subplot()
ax.scatter(0.4, 0.5, 100, fc='none', ec='k', alpha=.2)
ax.scatter(0.5, 0.5, 100, fc="none", ec="k")
ax.scatter(0.6, 0.5, 100, fc="none", ec="k", alpha=1)
fig.save('t2.png')

All 3 dots should have none facecolor` and black ecgecolor with difference alpha. But I got:

[cvanelteren]

That is indeed a bug. Kinda weird that for 'white' it works like it is transparent:

[cvanelteren]

It's cut off but i set the alpha for the first one to 1 and it acts as if transparent which is odd.

[cvanelteren]

Fixed in #312

[cvanelteren]

Fixed on main. Free free to close the issue if it resolved your problem.

[gepcel]

That is indeed a bug. Kinda weird that for 'white' it works like it is transparent:

From this image, Do you mind me asking what kind of editor you are using?

[cvanelteren]

Zed!

[gepcel]

I'm reopening this issue because I think it is related. Sometimes edgecolor is ignored. Let's see an example:

d = pd.DataFrame(dict(x=[1, 2], y=[1, 2], sizes=[300, 300]))
fig, ax = pplt.subplots(ncols=3)
ax[0].scatter("x", "y", s="sizes", data=d, fc="red8", ec="none", alpha=1)
ax[1].scatter("x", "y", s="sizes", data=d.loc[1], fc="red8", ec="none", alpha=1)
ax[2].scatter("x", "y", s="sizes", data=d.loc[1], fc="red8", ec="none")
ax.format(
    xlim=(0.8, 2.2),
    ylim=(0.9, 2.1),
    suptitle="ax[0]: Right ec with len(d)>1 and alpha"
    + "\nax[1]:Wrong ec with len(d)=1 and alpha"
    + "\nax[2]: Right ec with len(d)=1 and no alpha",
    suptitle_kw={"ha": "left"},
)

Seemed like edgecolor is only ignored when plotting data from a dataframe with only one row of data (len(d)==1), and alpha is given.

And, why has ha=left for suptitle been ignored? How can I make the suptitle align left horizontally?

[cvanelteren]

Hmm strange will explore this. Thanks for reporting.

[cvanelteren]

Let' s continue in #324