Closed as not planned
Closed as not planned
Description
Bug summary
This originally came up in jupyterlite/jupyterlite#850, but I'm pretty sure the root cause is here. I'll reproduce the most helpful comment from that thread here. The following is a pretty good demonstration of how savefig clips (e.g.) the title of a pie chart.
Possibly related issues:
- Feature request: savefig with separated pad_inches in each direction #11764
- [Bug]: figimage producing inconsistent results #23399
- [Bug]: Inconsistent rendering between backends when rendering Mathtext horizontal rule #23763
Code for reproduction
Run the following in Jupyter Lab to reproduce the attached images.
import matplotlib.pyplot
import base64, io
from enum import Enum
from ipywidgets import widgets
from fractions import Fraction
from itertools import chain
data = {3: Fraction(1, 216), 4: Fraction(1, 72), 5: Fraction(1, 36), 6: Fraction(5, 108), 7: Fraction(5, 72), 8: Fraction(7, 72), 9: Fraction(25, 216), 10: Fraction(1, 8), 11: Fraction(1, 8), 12: Fraction(25, 216), 13: Fraction(7, 72), 14: Fraction(5, 72), 15: Fraction(5, 108), 16: Fraction(1, 36), 17: Fraction(1, 72), 18: Fraction(1, 216)}
class Format(str, Enum):
NATIVE = "native"
PNG = "png"
SVG = "svg"
class PngImage:
def __init__(self, data):
self.data = data
def _repr_png_(self):
return base64.b64encode(self.data).decode()
class SvgImage:
def __init__(self, data):
self.data = data
def _repr_svg_(self):
return self.data.decode()
@widgets.interact
def show(output_to_format = Format, use_subplots: bool = True):
with matplotlib.style.context("bmh"):
if use_subplots:
_, ax = matplotlib.pyplot.subplots()
else:
fig = matplotlib.pyplot.figure()
xmin, ymin, dx, dy = 0.1, 0.1, 0.9, 0.9
ax = fig.add_axes((xmin, ymin, dx, dy))
unique_outcomes = sorted(data.keys())
ax.set_title(
"Super duper duper long title that will probably exceed the width of the pie chart",
fontdict={"fontweight": "bold",},
)
outcomes, values = zip(*((outcome, float(value)) for outcome, value in data.items()))
ax.pie(outcomes, values)
if output_to_format is Format.NATIVE:
matplotlib.pyplot.show()
else:
buf = io.BytesIO()
matplotlib.pyplot.savefig(buf, format=output_to_format)
if output_to_format is Format.PNG:
display(PngImage(buf.getvalue()))
elif output_to_format is Format.SVG:
display(SvgImage(buf.getvalue()))
else:
assert False, "should never be here"
matplotlib.pyplot.clf()
print(matplotlib.__version__)Actual outcome
| Output method | Using subplots |
Using add_axes |
|---|---|---|
show() |
 |
 |
savefig(..., format="png") |
 |
 |
savefig(..., format="svg") |
 |
 |
Expected outcome
I expected all backends to produce at least similar results (i.e., not ones where titles were clipped or missing entirely).
Additional information
No response
Operating system
No response
Matplotlib Version
3.5.2, 3.6.1
Matplotlib Backend
module://matplotlib_inline.backend_inline
Python version
3.10.6
Jupyter version
Lab 3.4.8
Installation
No response