Generate SVGs and PNGs of mathematical expressions using RaTeX

Contents

• Installation
• Example Output
• Supporting Ratex
• Attribution

Installation

Available in Hex, the package can be installed by adding ratex to your list of dependencies in mix.exs:

def deps do
  [
    {:ratex, "~> 0.1.0"}
  ]
end

Documentation can be found at https://hexdocs.pm/ratex.

Example Output

After setting up Ratex in your application you can use the Ratex functions in order to generate images of mathematical expressions:

Example 1

Ratex.render_svg!(~S"y = mx + b", :png)

Example 2

Ratex.render_svg!(~S"x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}", :png)

Example 3

Ratex.render_svg!(~S"\frac{d}{dx}\left[\frac{x^2 \sin(x)}{e^x}\right] = \frac{e^x(2x\sin(x) + x^2\cos(x)) - x^2\sin(x)\,e^x}{e^{2x}}", :png)

Example 4

Ratex.render_svg!(~S"\int_{0}^{\infty} \frac{\sqrt[3]{x}}{(1+x)^2} \, dx = \frac{2\pi}{3\sqrt{3}}", :png)

Example 5

Ratex.render_svg!(~S"\nabla f(\mathbf{x}) = \sum_{k=1}^{n} \frac{\partial}{\partial x_k} \left[ \int_{0}^{x_k} e^{-t^2} \, dt \right] \hat{e}_k = \begin{pmatrix} e^{-x_1^2} \\ e^{-x_2^2} \\ \vdots \\ e^{-x_n^2} \end{pmatrix}", :png)

Supporting Ratex

If you rely on this library help you debug your Ecto/SQL queries, it would much appreciated if you can give back to the project in order to help ensure its continued development.

Checkout my GitHub Sponsorship page if you want to help out!

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Attribution

• The Ratex library leans on the Rust library RaTeX for compiling LaTeX math expressions.