Closed
Description
Bug summary
I was working on a code to achieve the following look:
I got there by combining ax.plot() and ax.fill_between() functions. But then I've learnt about the ax.stairs() function which is suppose to plot in a step-like fashion and allows to add fill under the line in one go.
However, when I tried ax.stairs() I got the following result:
The bug (I think):
- the fill is completely wrong - it doesn't stretch between
x-axisand the line
Secondary issues:
- I don't think there's a way to have a separate colour for line and fill at the moment, when I set a colour, line disappears - this is especially visibile when I set e.g.
alpha=0.1 - I've got a feeling that somehow the grid ends up on top of the plot when I call
ax.stairs()
Code for reproduction
python
import matplotlib.pyplot as plt
x = [1, 4, 10, 12, 15, 20]
y = [2, 4, 1, 3, 1, 4]
fig, axs = plt.subplots(
2, 1,
figsize=(16,10),
facecolor="white",
sharex=True,
sharey=True
)
fig.suptitle(
"ax.stairs()",
fontsize=20,
)
# plot points
for ax in axs:
ax.scatter(
x, y,
marker="X",
s=275,
linewidth=1.5,
edgecolor="black",
facecolor="white",
zorder=100 # crude way to keep the points always on top
)
axs[0].stairs(
values=y, # step height
edges=[x[0], *x], # edge width
baseline=None,
color="red",
fill=True,
label="steps-pre: duplicate 1st element in `edges=[x[0], *x]`"
)
axs[1].stairs(
values=y, # step height
edges=[*x, x[-1]], # edge
baseline=None,
color="green",
fill=True,
alpha=0.1,
label="steps-post: duplicate last element in `edges=[*x, x[-1]]`"
)
# set axis limits
axs[0].set_ylim(0, 5.5)
axs[0].set_yticks(range(1, 6))
axs[0].set_xlim(0, 21)
axs[1].set_xticks(range(1, 21))
# add legend
for ax in axs:
ax.legend(
fontsize=16,
loc="upper center",
facecolor="whitesmoke",
edgecolor="none"
)
# Update font size of the 'x' and 'y' axis labels
ax.tick_params(
axis="both",
labelsize=16
)
ax.grid(
color="gainsboro",
linewidth=0.5
)
# Remove spines
for position in ["top", "right"]:
for ax in axs:
ax.spines[position].set_visible(False)
plt.tight_layout()
### Actual outcome
### Expected outcome
### Additional information
_No response_
### Operating system
Windows
### Matplotlib Version
3.7.2
### Matplotlib Backend
module://matplotlib_inline.backend_inline
### Python version
3.10.2
### Jupyter version
IPython : 8.14.0 ipykernel : 6.25.1 ipywidgets : not installed jupyter_client : 8.3.0 jupyter_core : 5.3.1 jupyter_server : not installed jupyterlab : not installed nbclient : not installed nbconvert : not installed nbformat : not installed notebook : not installed qtconsole : not installed traitlets : 5.9.0
### Installation
pip
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