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In addition to our API server code, we have a number of user oriented packages, such as API clients and time-series modeling for epidemiology. All source code is freely available on [GitHub](https://github.com/cmu-delphi/).
A collection of data structures and methods for handling epidemiological data.
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The major features are:
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- The epi_df structure, which allows you track epidemiological data measured over location and time (and other potential keys).
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- The epi_archive structure, which allows you to store epi_df objects in a versioned archive and to query the archive for the state of the data at any point in time.
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- Support for applying generic functions across a sliding time window, building on tools like [slider](https://slider.r-lib.org/). Comes with support for
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- handling gaps in time
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- automatically handling grouping of keys
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- Support for version aware data transformation and forecasting, which allows for simple and accurate backtesting of forecasting models (using only the actual data that was available at the time of the forecast and not the revised versions).
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- Growth rate estimation, as estimated using relative rates of change, linear regression, smooth splines, or polynomial trend filtering.
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- Outlier detection and correction, using rolling median or LOESS trend decomposition.
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- Signal correlation over space, time and other keys. It also supports lagged correlations, automatically handles grouping by the specified keys, and handles time gaps.
A framework for building epidata pipelines involving transformation and forecasting. It is designed to work smoothly with epiprocess and provides a simple interface for defining and running forecasting workflows. It supports:
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- A simple interface for defining a sequence of data pre-processing, forecasting, and post-processing steps.
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- A collection of data processing steps common to epidata.
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- A collection of pre-packaged forecasting models commonly used by Delphi's forecasting team.
API for getting up-to-date epidemiological data (also available via a web interface through [EpiVis](https://delphi.cmu.edu/epivis/epivis.html) and a [Dashboard](covidcast/dashboard)).
The primary dashboard to interact with delphi data. If you wish to access the results programmatically, see the [API](#Delphi_Epidata_API), or one of it's clients.
We host a forecast evaluation dashboard to compare the historical performance of the forecasts submitted to the [COVID-19 Forecast Hub](https://covid19forecasthub.org/).
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Our current system for generating forecasts will be available soon [here](https://github.com/cmu-delphi/covid-hosp-forecast).
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In addition to publishing the individual forecasts from the participating groups, the Reich lab makes an ensemble prediction, and hosts a [visualization of both](https://viz.covid19forecasthub.org).
We host a forecast evaluation dashboard to compare the historical performance of the forecasts submitted to the [COVID-19 Forecast Hub](https://covid19forecasthub.org/).
A map-first single-page webapp for visualizing COVID-19 pandemic indicators.
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### [Crowdcast](/crowdcast)
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Delphi’s "Wisdom of crowds" forecasting system: Used for Chikungunya, flu and most recently Covid. In it's archived configuration, this system was set up to forecast ILI during the COVID-19 pandemic
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### [ILI Nearby](/nowcast)
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Flu nowcasting system.
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**Note:** This system is designed to nowcast ILI driven by seasonal
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influenza and is NOT designed to nowcast ILI during the COVID-19 pandemic.
R package that implements several methods for epidemiological forecasting empirical bayes (EB), basis regression (BR), and time-weighted kernel density estimation (twkde).
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