{-# LANGUAGE DeriveGeneric, OverloadedStrings, DataKinds #-}
{-# OPTIONS_GHC -fno-warn-unused-imports #-}

{-|

Monthly sunspots from 1749

Listed as sunspot.month here: http://vincentarelbundock.github.io/Rdatasets/datasets.html

See <http://vincentarelbundock.github.io/Rdatasets/doc/datasets/sunspot.month.html>

-}

module Numeric.Datasets.Sunspots where

import Numeric.Datasets

import Data.Csv
import GHC.Generics
import Control.Applicative
import Network.HTTP.Req ((/:), http, Scheme(..))

data Sunspot = Sunspot
  { time :: Double
  , sunspotMonth :: Double
  } deriving (Show, Read, Generic)

instance FromNamedRecord Sunspot where
    parseNamedRecord m = Sunspot <$>
                         m .: "time" <*>
                         m .: "value"

sunspots :: Dataset Sunspot
sunspots = csvHdrDataset
   $ URL $ http "vincentarelbundock.github.io" /: "Rdatasets" /: "csv" /: "datasets" /: "sunspot.month.csv"

--  "http://vincentarelbundock.github.io/Rdatasets/csv/datasets/sunspot.month.csv"