eFrog

Examples

Pick any program below — eFrog opens it in the translator with the recommended target pre-selected. Every example is small enough to read end to end and exercises a different EML primitive.

Numerics

Sigmoid

Rust

Logistic function 1 / (1 + exp(-x)). Saturates outside ±5.

PythonRust

Gaussian PDF

C

Bell curve. Three params: mean, stddev, sample point.

PythonC

Newton root step

Rust

One iteration of Newton's method on f(x) = x² - a.

PythonRust

Softplus

JavaScript

Smooth ReLU: ln(1 + exp(x)). Always differentiable.

PythonJavaScript

Signal processing

RC low-pass filter

Rust

Single-step IIR. y[n] = α·x[n] + (1-α)·y[n-1].

CRust

3-tap FIR filter

MATLAB

Symmetric 3-tap FIR. Linear phase, audio-grade.

JavaScriptMATLAB

Control & dynamics

PID controller

C

Proportional + integral + derivative. Classic feedback loop.

PythonC

Logistic map

JavaScript

Chaos in one line. xₙ₊₁ = r·xₙ·(1 - xₙ).

RustJavaScript

Finance

Black-Scholes d₁

C

First half of the European-call pricer.

PythonC

Compound interest

Python

Continuous compounding: P · exp(r · t).

MATLABPython

Graphics

Smoothstep

Rust

Hermite-interpolated edge — shader staple.

JavaScriptRust

Rec. 709 luminance

JavaScript

Standard RGB → grey weighted sum.

CJavaScript

Don't see your function?

eFrog reads any function whose body reduces to the 16 EML primitives — arithmetic, transcendentals, comparisons. Paste your own on the translator and watch the math fall out.