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Last active September 21, 2023 01:56
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Render TeX to SVG in Python using matplotlib and display with PyQt
import sys
from PyQt5.QtWidgets import QApplication
from PyQt5.QtSvg import QSvgWidget
from io import BytesIO
import matplotlib.pyplot as plt
# matplotlib: force computer modern font set
plt.rc('mathtext', fontset='cm')
def tex2svg(formula, fontsize=12, dpi=300):
"""Render TeX formula to SVG.
Args:
formula (str): TeX formula.
fontsize (int, optional): Font size.
dpi (int, optional): DPI.
Returns:
str: SVG render.
"""
fig = plt.figure(figsize=(0.01, 0.01))
fig.text(0, 0, r'${}$'.format(formula), fontsize=fontsize)
output = BytesIO()
fig.savefig(output, dpi=dpi, transparent=True, format='svg',
bbox_inches='tight', pad_inches=0.0, frameon=False)
plt.close(fig)
output.seek(0)
return output.read()
def main():
FORMULA = r'\int_{-\infty}^\infty e^{-x^2}\,dx = \sqrt{\pi}'
app = QApplication(sys.argv)
svg = QSvgWidget()
svg.load(tex2svg(FORMULA))
svg.show()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
@gmarull
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gmarull commented Mar 5, 2018

Preview (scaled window):

image

@GzuPark
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GzuPark commented Jan 9, 2021

Thank you!

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