Table of Contents

1. TimeSeries Library for Rust
   1. Table of Contents
   2. Installation
   3. Usage
   4. Features
   5. Highlight Feature: The map Method
      1. Using a Lambda Function
      2. Using a Named Function
      3. Changing the Type
   6. Contributing

TimeSeries Library for Rust

A simple and flexible TimeSeries library in Rust.

Table of Contents

• Installation
• Usage
• Features
• Contributing
• License

Installation

To install the TimeSeries library, add the following line to your Cargo.toml:

Usage

Import the library and start using it like so:

extern crate time_series;

use time_series::TimeSeries;
use time_series::Variation; // if you want to use the variation methods like diff and pct_change

Here's a quick example that demonstrates how to create a new TimeSeries instance, add elements, and perform a map operation:

let mut ts = TimeSeries::new();
ts.push(1);
ts.push(2);
ts.push(3);

let new_ts = ts.map(|&x| x * 2);
println!("{:?}", new_ts); // Should print TimeSeries([2, 4, 6])

Features

• Basic TimeSeries manipulation methods such as push, pop, len, is_empty, and slice.
• Variation trait for statistical calculations like diff and pct_change.
• Generic design allows for storing any type that implements the Clone trait.

Highlight Feature: The map Method

One of the key features of this TimeSeries library is the map method. This method allows you to transform a TimeSeries<T> into a TimeSeries<U> by applying a function f: &T -> U to each element in the series.

The function takes a closure or a named function that receives an immutable reference to the data point and should return a new data point of possibly a different type.

Using a Lambda Function

Here's how you can use it with a lambda function:

let mut ts = TimeSeries::new();
ts.push(1);
ts.push(2);
ts.push(3);

let new_ts = ts.map(|&x| x * 2);
println!("{:?}", new_ts);  // Should print TimeSeries([2, 4, 6])

Using a Named Function

You can also use a named function to achieve the same transformation:

fn transform(x: &i32) -> i32 {
    x * 2
}

let mut ts = TimeSeries::new();
ts.push(1);
ts.push(2);
ts.push(3);

let new_ts = ts.map(transform);
println!("{:?}", new_ts);  // Should print TimeSeries([2, 4, 6])

Changing the Type

You can even change the type of data stored in the TimeSeries:

let mut ts = TimeSeries::new();
ts.push(1);
ts.push(2);
ts.push(3);

let new_ts: TimeSeries<String> = ts.map(|&x| format!("Value: {}", x));
println!("{:?}", new_ts);  // Should print TimeSeries(["Value: 1", "Value: 2", "Value: 3"])

This feature makes it incredibly easy to convert time series data into various time series indices or to apply any kind of transformations needed for your specific use-case.

Contributing

Contributions are welcome! Please fork the repository and open a pull request with your changes, or open an issue for discussion.