latexalign

While latexify does not provide a $\LaTeX$ environment surrounding the resulting string, latexalign does. As the name implies, it creates an align environment.

lhs = ["dx/dt", "dy/dt"]
rhs = ["y^2 - x", "x/y - y"]
print(latexalign(lhs, rhs))

outputs:

\begin{align}
\frac{dx}{dt} =& y^{2} - x \\
\frac{dy}{dt} =& \frac{x}{y} - y \\
\end{align}

In Jupyter, this can be rendered by:

display("text/latex", latexalign(lhs, rhs))

\begin{align*} \frac{dx}{dt} =& y^{2} - x \\ \frac{dy}{dt} =& \frac{x}{y} - y \\ \end{align*}

Using DifferentialEquations.jl

The motivation for creating this function was mainly to be able to render ODEs. In my own work, I tend to use DifferentialEquations.jl to define ODEs as ParameterizedFunctions. Therefore, I found it useful to create a method which simply takes the ParameterizedFunction as input:

using DifferentialEquations
ode = @ode_def positiveFeedback begin
    dx = y/(k_y + y) - x
    dy = x^n_x/(k_x^n_x + x^n_x) - y
end k_y=>1.0 k_x=>1.0 n_x=>1

print(latexalign(ode))

This generates $\LaTeX$ code that renders as:

\begin{align} \frac{dx}{dt} =& \frac{y}{k_{y} + y} - x \\ \frac{dy}{dt} =& \frac{x^{n_{x}}}{k_{x}^{n_{x}} + x^{n_{x}}} - y \\ \end{align}