How can I display LaTeX code in a IPython Notebook?
This question is related to
latex
jupyter-notebook
ipython
The answer given by minrk (included for completeness) is good, but there is another way that I like even more.
You can also render an entire cell as LaTeX
by typing %%latex
as the first line in a text cell. This is usefull if you
minrk's answer:
IPython notebook uses MathJax to render LaTeX inside html/markdown. Just put your LaTeX math inside
$$
.$$c = \sqrt{a^2 + b^2}$$
Or you can display LaTeX / Math output from Python, as seen towards the end of the notebook tour:
from IPython.display import display, Math, Latex display(Math(r'F(k) = \int_{-\infty}^{\infty} f(x) e^{2\pi i k} dx'))
Use $$ if you want your math to appear in a single line, e.g.,
$$a = b + c$$ (line break after the equation)
If you don't need a line break after the math, use single dollar sign $, e.g.,
$a = b + c$ (no line break after the equation)
Udacity's Blog has the Best LaTeX Primer I've seen: It clearly shows how to use LaTeX commands in easy to read, and easy to remember manner !! Highly recommended.
This Link has Excellent Examples showing both the code, and the rendered result !
You can use this site to quickly learn how to write LaTeX by example.
And, here is a quick Reference for LaTeX commands/symbols.
inline, wrap in: $
The equation used depends on whether the the value of
$V?max??$ is R, G, or B.
block, wrap in: $$
$$H? ?????0 ?+? \frac{??30(G-B)??}{Vmax-Vmin} ??, if V?max?? = R$$
block, wrap in: \begin{equation}
and \end{equation}
\begin{equation}
H? ???60 ?+? \frac{??30(B-R)??}{Vmax-Vmin} ??, if V?max?? = G
\end{equation}
block, wrap in: \begin{align}
and \end{align}
\begin{align}
H?120 ?+? \frac{??30(R-G)??}{Vmax-Vmin} ??, if V?max?? = B
\end{align}
LaTex Cell: %%latex
magic command turns the entire cell into a LaTeX Cell
%%latex
\begin{align}
\nabla \cdot \vec{\mathbf{E}} & = 4 \pi \rho \\
\nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t} & = \vec{\mathbf{0}} \\
\nabla \cdot \vec{\mathbf{B}} & = 0
\end{align}
Math object to pass in a raw LaTeX string:
from IPython.display import Math
Math(r'F(k) = \int_{-\infty}^{\infty} f(x) e^{2\pi i k} dx')
Latex class. Note: you have to include the delimiters yourself. This allows you to use other LaTeX modes such as eqnarray
:
from IPython.display import Latex
Latex(r"""\begin{eqnarray}
\nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t} & = \frac{4\pi}{c}\vec{\mathbf{j}} \\
\nabla \cdot \vec{\mathbf{E}} & = 4 \pi \rho \\
\nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t} & = \vec{\mathbf{0}} \\
\nabla \cdot \vec{\mathbf{B}} & = 0
\end{eqnarray}""")
(sorry, no example here, just the docs)
Raw cells Raw cells provide a place in which you can write output directly. Raw cells are not evaluated by the notebook. When passed through
nbconvert
, raw cells arrive in the destination format unmodified. For example, this allows you to type full LaTeX into a raw cell, which will only be rendered by LaTeX after conversion bynbconvert
.
For Markdown Cells, as quoted from Jupyter Notebook docs:
Within Markdown cells, you can also include mathematics in a straightforward way, using standard LaTeX notation: $...$ for inline mathematics and $$...$$ for displayed mathematics. When the Markdown cell is executed, the LaTeX portions are automatically rendered in the HTML output as equations with high quality typography. This is made possible by MathJax, which supports a large subset of LaTeX functionality
Standard mathematics environments defined by LaTeX and AMS-LaTeX (the amsmath package) also work, such as \begin{equation}...\end{equation}, and \begin{align}...\end{align}. New LaTeX macros may be defined using standard methods, such as \newcommand, by placing them anywhere between math delimiters in a Markdown cell. These definitions are then available throughout the rest of the IPython session.
I am using Jupyter Notebooks. I had to write
%%latex
$sin(x)/x$
to get a LaTex font.
If your main objective is doing math, SymPy provides an excellent approach to functional latex expressions that look great.
You can choose a cell to be markdown, then write latex code which gets interpreted by mathjax, as one of the responders say above.
Alternatively, Latex section of the iPython notebook tutorial explains this well.
You can either do:
from IPython.display import Latex
Latex(r"""\begin{eqnarray}
\nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t} & = \frac{4\pi}{c}\vec{\mathbf{j}} \\
\nabla \cdot \vec{\mathbf{E}} & = 4 \pi \rho \\
\nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t} & = \vec{\mathbf{0}} \\
\nabla \cdot \vec{\mathbf{B}} & = 0
\end{eqnarray}""")
or do this:
%%latex
\begin{align}
\nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t} & = \frac{4\pi}{c}\vec{\mathbf{j}} \\
\nabla \cdot \vec{\mathbf{E}} & = 4 \pi \rho \\
\nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t} & = \vec{\mathbf{0}} \\
\nabla \cdot \vec{\mathbf{B}} & = 0
\end{align}
More info found in this link
IPython notebook uses MathJax to render LaTeX inside html/markdown. Just put your LaTeX math inside $$
.
$$c = \sqrt{a^2 + b^2}$$
Or you can display LaTeX / Math output from Python, as seen towards the end of the notebook tour:
from IPython.display import display, Math, Latex
display(Math(r'F(k) = \int_{-\infty}^{\infty} f(x) e^{2\pi i k} dx'))
I wrote how to write LaTeX in Jupyter Notebook in this article.
You need to enclose them in dollar($) signs.
$P(A)=\frac{n(A)}{n(U)}$
$$P(A)=\frac{n(A)}{n(U)}$$
Use \limits
for \lim
, \sum
and \int
to add limits to the top and the bottom of each sign.
Use a backslash to escape LaTeX special words such as Math symbols, Latin words, text, etc.
Try this one.
$$\overline{x}=\frac{\sum \limits _{i=1} ^k f_i x_i}{n} \text{, where } n=\sum \limits _{i=1} ^k f_i $$
$$
\begin{align}
\text{Probability density function:}\\
\begin{cases}
\frac{1}{b-a}&\text{for $x\in[a,b]$}\\
0&\text{otherwise}\\
\end{cases}
\\
\text{Cumulative distribution function:}\\
\begin{cases}
0&\text{for $x<a$}\\
\frac{x-a}{b-a}&\text{for $x\in[a,b)$}\\
1&\text{for $x\ge b$}\\
\end{cases}
\end{align}
$$
The above code will create this.
If you want to know how to add numbering to equations and align equations, please read this article for details.
I came across this problem some day using colab. And I find the most painless way is just running this code before printing. Everything works like charm then.
from IPython.display import Math, HTML
def load_mathjax_in_cell_output():
display(HTML("<script src='https://www.gstatic.com/external_hosted/"
"mathjax/latest/MathJax.js?config=default'></script>"))
get_ipython().events.register('pre_run_cell', load_mathjax_in_cell_output)
import sympy as sp
sp.init_printing()
The result looks like this:
Since, I was not able to use all the latex commands in Code even after using the %%latex keyword or the $..$ limiter, I installed the nbextensions through which I could use the latex commands in Markdown. After following the instructions here: https://github.com/ipython-contrib/IPython-notebook-extensions/blob/master/README.md and then restarting the Jupyter and then localhost:8888/nbextensions and then activating "Latex Environment for Jupyter", I could run many Latex commands. Examples are here: https://rawgit.com/jfbercher/latex_envs/master/doc/latex_env_doc.html
\section{First section}
\textbf{Hello}
$
\begin{equation}
c = \sqrt{a^2 + b^2}
\end{equation}
$
\begin{itemize}
\item First item
\item Second item
\end{itemize}
\textbf{World}
As you see, I am still unable to use usepackage. But maybe it will be improved in the future.
Yet another solution for when you want to have control over the document preamble. Write a whole document, send it to system latex, convert the pdf to png, use IPython.display
to load and display.
import tempfile
import os.path
import subprocess
from IPython.display import Image, display
with tempfile.TemporaryDirectory(prefix="texinpy_") as tmpdir:
path = os.path.join(tmpdir, "document.tex")
with open(path, 'w') as fp:
fp.write(r"""
\documentclass[12pt]{standalone}
\begin{document}
\LaTeX{}
\end{document}
""")
subprocess.run(["lualatex", path], cwd=tmpdir)
subprocess.run(["pdftocairo", "-singlefile", "-transp", "-r", "100", "-png", "document.pdf", "document"], cwd=tmpdir)
im = Image(filename=os.path.join(tmpdir, "document.png"))
display(im)
Using LaTeX syntax directly in a Markdown cell works for me. I'm using Jypiter 4.4.0.
I don't have to use %%latex
magic command, I insist, simply a markdown cell:
\begin{align}
\nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t} & = \frac{4\pi}{c}\vec{\mathbf{j}} \\
\nabla \cdot \vec{\mathbf{E}} & = 4 \pi \rho \\
\nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t} & = \vec{\mathbf{0}} \\
\nabla \cdot \vec{\mathbf{B}} & = 0
\end{align}
Renders to:
Source: Stackoverflow.com