# ESP (Estimating Spectra from Photometry) [](https://travis-ci.org/jbkalmbach/ESP)[](https://codecov.io/github/jbkalmbach/ESP?branch=master)[](http://www.gnu.org/licenses/gpl-3.0)
## Purpose ESP is a way to estimate galaxy spectra using Principal Component Analysis (PCA) and Gaussian Processes. Starting from a set of known spectra and a set of bandpasses you can predict spectra for other points in the color space of your bands both interpolating and extrapolating throughout the color space.
## Setup
ESP is pip installable. From the command line run:
pip install esphot
Now to use from python, just:
import esp
## How to Use See the [example jupyter notebook](https://github.com/jbkalmbach/ESP/blob/master/examples/esp_example.ipynb) in the examples folder.
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[](https://travis-ci.org/jbkalmbach/ESP)[
](http://www.gnu.org/licenses/gpl-3.0){kind=link}