epw-rs

Parser for the EnergyPlus Weather file format

Note:

This library is still alpha-stage and the API is subject to change until we stabilize it in the 0.2 release.

Summary

Rust library for reading EnergyPlus weather data files. These files typically contain detailed hourly (or sub-hourly) weather data for a given location used for energy modeling.

Introduction

The library presents a fairly small API, built around the EPWFile struct. It includes functions for reading from a BufRead buffer, or from a filepath.

Reading an EPW file

Heres a basic example of using the library to read a TMY file in epw format.

use epw_rs::*;

let epw = EPWFile::from_path("./data/USA_FL_Tampa_TMY2.epw").unwrap();
println!("Header: {:?}\nData:   {:?}", epw.header, epw.data);

Feature Roadmap

• Read Header and Data

• Polars DataFrame output

• Lazy load data

• PresentWeather Enum

• Write EPW files

Features

polars

The polars feature provides support for building a DataFrame from the weather data

use epw_rs::*;


let epw = EPWFile::from_path("./data/USA_FL_Tampa_TMY2.epw").unwrap();
let df = epw.data.to_dataframe();
println!("{}", df.unwrap())

// output: 
// ┌─────────────────────┬──────────────────────┬───────────────────────┬───────────────────┬───┬───────────────────────┬────────────┬──────────────────────────┬────────┐
// │ timestamp           ┆ dry_bulb_temperature ┆ dew_point_temperature ┆ relative_humidity ┆ … ┆ aerosol_optical_depth ┆ snow_depth ┆ days_since_last_snowfall ┆ albedo │
// │ ---                 ┆ ---                  ┆ ---                   ┆ ---               ┆   ┆ ---                   ┆ ---        ┆ ---                      ┆ ---    │
// │ datetime[ms]        ┆ f64                  ┆ f64                   ┆ f64               ┆   ┆ f64                   ┆ f64        ┆ f64                      ┆ f64    │
// ╞═════════════════════╪══════════════════════╪═══════════════════════╪═══════════════════╪═══╪═══════════════════════╪════════════╪══════════════════════════╪════════╡
// │ 1987-01-01 05:00:00 ┆ 20.6                 ┆ 18.9                  ┆ 90.0              ┆ … ┆ 0.062                 ┆ 0.0        ┆ 88.0                     ┆ NaN    │
// │ 1987-01-01 06:00:00 ┆ 20.0                 ┆ 18.3                  ┆ 90.0              ┆ … ┆ 0.062                 ┆ 0.0        ┆ 88.0                     ┆ NaN    │
// │ 1987-01-01 07:00:00 ┆ 20.0                 ┆ 17.2                  ┆ 84.0              ┆ … ┆ 0.062                 ┆ 0.0        ┆ 88.0                     ┆ NaN    │
// │ 1987-01-01 08:00:00 ┆ 18.3                 ┆ 16.1                  ┆ 87.0              ┆ … ┆ 0.062                 ┆ 0.0        ┆ 88.0                     ┆ NaN    │
// │ 1987-01-01 09:00:00 ┆ 17.8                 ┆ 15.0                  ┆ 84.0              ┆ … ┆ 0.062                 ┆ 0.0        ┆ 88.0                     ┆ NaN    │
// │ …                   ┆ …                    ┆ …                     ┆ …                 ┆ … ┆ …                     ┆ …          ┆ …                        ┆ …      │

For a more detailed example see examples/polars.rs.