Rates

Rates are used to control the application frequency of alters. They can be static (fixed) or dynamic (changing over time). Radiate provides several built-in rate strategies to help you fine-tune the behavior of the alterers. Each mutator and crossover in Radiate accepts a rate parameter. In Python, the rate parameter can be either a float (for fixed rates) or an instance of the Rate class (for dynamic rates). In Rust, the rate parameter is anything that implements Into<Rate>. Below we can see the available rate strategies generated by the code snippet:

import radiate as rd

rate = rd.Rate...

rates = []
for i in range(100):
    rates.append(rate.value(i))

Fixed

• Purpose: Applies a constant rate throughout the evolution process - this is the default behavior and can be thought of as the "standard" rate.

Python Rust

import radiate as rd

rate = rd.Rate.fixed(0.1)

use radiate::*;

let rate = Rate::fixed(0.1);

Linear

• Purpose: Gradually changes the rate from a starting value to an ending value over a specified duration, allowing for a smooth transition in the application frequency of the alterer.

Python Rust

import radiate as rd

rate = rd.Rate.linear(start=0.1, end=0.9, duration=25)

use radiate::*;

let rate = Rate::linear(0.1, 0.9, 25);

Stepwise

• Purpose: Changes the rate at specified intervals, allowing for abrupt changes in the application frequency of the alterer.

Python Rust

import radiate as rd

steps = [(0, 0.1), (25, 0.5), (75, 0.9)]
rate = rd.Rate.stepwise(steps)

use radiate::*;

let steps = vec![(0, 0.1), (25, 0.5), (75, 0.9)];
let rate = Rate::stepwise(steps);
let rate = Rate::from(steps);

Sine Cyclical

• Purpose: Oscillates the rate between a minimum and maximum value over a specified period, allowing for periodic changes in the application frequency of the alterer.

Python Rust

import radiate as rd

rate = rd.Rate.sine(min=0.1, max=0.9, periods=10)

use radiate::*;

let rate = Rate::cyclical(0.1, 0.9, 10, "sine");

Triangular Cyclical

• Purpose: Oscillates the rate between a minimum and maximum value over a specified period using a triangular wave, allowing for periodic changes in the application frequency of the alterer.

Python Rust

import radiate as rd

rate = rd.Rate.triangular(min=0.1, max=0.9, periods=10)

use radiate::*;

let rate = Rate::cyclical(0.1, 0.9, 10, "triangular");

Exponential

• Purpose: Changes the rate exponentially from a starting value to an ending value over a specified duration, allowing for rapid changes in the application frequency of the alterer.

Python Rust

import radiate as rd

rate = rd.Rate.exp(start=0.5, end=0.1, half_life=25)

use radiate::*;

let rate = Rate::exponential(0.5, 0.1, 25);