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diff --git a/Programm/src/StudentsPerformanceInExams.elm b/Programm/src/StudentsPerformanceInExams.elm
new file mode 100644
index 0000000000000000000000000000000000000000..1157ba3afb2300f779f8b9e2eb01511ba23873e6
--- /dev/null
+++ b/Programm/src/StudentsPerformanceInExams.elm
@@ -0,0 +1,460 @@
+module StudentsPerformanceInExams exposing (main)
+
+-- elm stuff
+import Browser
+import Html exposing (Html, text, pre, div)
+import Http
+import Dict
+import Maybe.Extra
+-- Decode and Date, Time stuff
+import Html.Parser
+import Parser
+import Csv
+import Csv.Decode
+import Date
+import Time exposing (Month(..))
+-- Svg stuff
+import TypedSvg exposing (circle, g, rect, style, svg, text_)
+import TypedSvg.Attributes exposing (class, fontFamily, fontSize, textAnchor, transform, viewBox)
+import TypedSvg.Attributes.InPx exposing (cx, cy, height, r, width, x, y)
+import TypedSvg.Core exposing (Svg)
+import TypedSvg.Types exposing (AnchorAlignment(..), Length(..), Transform(..))
+-- visualisation
+import Scale exposing (ContinuousScale)
+import Scale.Color
+import Statistics
+-- other
+import Color
+
+-- MAIN
+main =
+ Browser.element
+ { init = init
+ , update = update
+ , subscriptions = subscriptions
+ , view = view
+ }
+
+-- MODEL
+type alias Model = { httpState : HttpState
+ , fullTexts : List {description: String, data: String}
+ , data : List Data
+ , error : String
+ }
+
+type HttpState
+ = Failure
+ | Loading Int
+ | Success
+
+type Arrangement
+ = Line_By_Line
+ | Forth_Loop
+
+type alias Data = {description: String, data: List ( String, Maybe Float )}
+
+filesToLoad =
+ [ --"http://roycekimmons.com/system/generate_data.php?dataset=exams&n=1000"
+ --"https://www.kaggle.com/spscientist/students-performance-in-exams/download"
+ "http://localhost:8000/src/StudentsPerformance.csv"
+ ]
+
+init : () -> (Model, Cmd Msg)
+init _ =
+ ( Model (Loading <| List.length filesToLoad) [] [] ""
+ , Cmd.batch <|
+ List.map (\file ->
+ Http.get
+ { url = file
+ , expect = Http.expectString <| GotText file
+ }
+ ) filesToLoad
+ )
+
+-- UPDATE
+type Msg
+ = GotText String (Result Http.Error String)
+
+update : Msg -> Model -> ( Model, Cmd Msg)
+update msg model = (updateModel msg model, Cmd.none)
+
+updateModel : Msg -> Model -> Model
+updateModel msg model =
+ case msg of
+ GotText file result ->
+ case result of
+ Ok fullText ->
+ case model.httpState of
+ Failure -> {model | httpState = Failure}
+ Loading filesLeft ->
+ if filesLeft-1 == 0 then
+ let newFullTexts = {description = file, data = fullText}::model.fullTexts
+ checkedFullTexts = List.map checkInputFormat newFullTexts
+ in
+ { model | httpState = Success
+ , fullTexts = checkedFullTexts
+ , data = prepareData <|
+ List.map
+ (\data -> Data data.description <| csvString_to_data data.data)
+ checkedFullTexts
+ }
+ else{ model | httpState = Loading (filesLeft-1)
+ , fullTexts = {description = file, data = fullText}::model.fullTexts
+ }
+ Success -> {model | httpState = Failure}
+ Err e -> { model | httpState = Failure
+ , error = httpErrorToString e
+ }
+
+-- SUBSCRIPTIONS
+subscriptions : Model -> Sub Msg
+subscriptions model = Sub.none
+
+-- VIEW
+view : Model -> Html Msg
+view model =
+ case model.httpState of
+ Failure ->
+ text model.error
+
+ Loading index->
+ text ("Loading... "++(String.fromInt index)++" left")
+
+ Success ->
+ text <| Maybe.withDefault "Nothing here" <| List.head <| List.map .data model.fullTexts
+
+ {-
+ let rawlevel : Int -> List (Int,Int)
+ rawlevel years = [(years,1),(1,12),(4,1),(1,5),(1,1)]
+
+ fstData = (list_get model.data 0).data
+ numberDays = List.length fstData
+ numberYears = let years = List.map (\date -> case date of
+ Ok aDate -> Date.weekYear aDate
+ Err _ -> 2000
+ ) <| List.map Date.fromIsoString <| List.map Tuple.first fstData
+ in (Maybe.withDefault 0 <| List.maximum years) - (Maybe.withDefault 0 <| List.minimum years)
+ rawlevel_uncorrected = rawlevel numberYears
+ numberSlots_uncorrected = List.foldl (*) 1 <| List.map (\(x,y)-> x*y) <| rawlevel_uncorrected
+ diffDays = toFloat <| numberDays-numberSlots_uncorrected
+ daysPerYear = toFloat <| List.foldl (*) 1 <| List.map (\(x,y)-> x*y) <| List.drop 1 <| rawlevel numberYears
+ correctedYears = if numberSlots_uncorrected > numberDays then numberYears
+ else numberYears + (ceiling <| diffDays / daysPerYear)
+
+ rawlevel_corrected = rawlevel correctedYears
+
+ numberSlots = List.foldl (*) 1 <| List.map (\(x,y)-> x*y) rawlevel_corrected
+
+ level = augmentLevel rawlevel_corrected
+ drawList_Line_by_Line = drawArrangement Line_By_Line level
+ drawList_Forth_Loop = drawArrangement Forth_Loop level
+ w = 50
+ h = 20
+ in
+ div []
+ [ Html.div [] [Html.text <| "Anzahl Tage pro Zeitreihe:"++(String.fromInt numberDays)]
+ , Html.div [] [Html.text <| "Anzahl Slots pro Zeitreihe: "++(String.fromInt numberSlots)]
+ , Html.table []
+ <| List.append
+ [ Html.tr []
+ [ Html.td [] []
+ , Html.td [] [Html.text "Line by Line Arrangement"]
+ , Html.td [] [Html.text "Forth-Loop Arrangement"]
+ ]
+ ]
+ <| List.map (\zeitreihe ->
+ Html.tr []
+ [ Html.td [] [Html.text zeitreihe.description]
+ , Html.td [] [viewData (w,h) drawList_Line_by_Line zeitreihe]
+ , Html.td [] [viewData (w,h) drawList_Forth_Loop zeitreihe]
+ ]
+ ) model.data
+ ]-}
+
+-- viewHelper
+viewArrangement : Arrangement -> List ( Int, Int ) -> Html Msg
+viewArrangement arrangement drawList =
+ Html.div []
+ [ Html.text <| " Arrangement:"
+ , Html.table []
+ <| List.map (\line ->
+ Html.tr [] <| List.map (\n -> Html.td [] [Html.text <| String.fromInt n]) line
+ ) (coordsListToListOfLines drawList)
+ ]
+
+viewDataWithDescription : (Int,Int) -> List ( Int, Int ) -> Data -> Html Msg
+viewDataWithDescription (w,h) drawList zeitreihe =
+ Html.div []
+ [ Html.h4 [] [Html.text zeitreihe.description]
+ , viewData (w,h) drawList zeitreihe
+ ]
+
+viewData : (Int,Int) -> List ( Int, Int ) -> Data -> Html Msg
+viewData (w,h) drawList zeitreihe =
+ Html.div [] [svg [ viewBox 0 0 (toFloat w) (toFloat h)
+ , TypedSvg.Attributes.width <| TypedSvg.Types.Percent 100
+ , TypedSvg.Attributes.height <| TypedSvg.Types.Percent 100
+ ][ drawDimension (w,h) drawList zeitreihe.data ]]
+
+-- Decode csv-String
+checkInputFormat : {description: String, data: String} -> {description: String, data: String}
+checkInputFormat input =
+ if String.left 15 input.data == "<!DOCTYPE HTML>" then
+ let -- Error handling for parsing
+ deadEndsToString : List Parser.DeadEnd -> String -- sadly Parser.deadEndsToString always just prints "TODO: deadEndsToString"
+ deadEndsToString deadEnds = "[ "++(List.foldl (++) " ]" <| List.map deadEndToString deadEnds)
+
+ deadEndToString : Parser.DeadEnd -> String
+ deadEndToString {row,col,problem} = "row = "++(String.fromInt row)++", col = "++(String.fromInt col)++", problem = "++(problemToString problem)
+
+ problemToString : Parser.Problem -> String
+ problemToString problem =
+ case problem of
+ Parser.Expecting string -> "Expecting \""++string++"\""
+ Parser.ExpectingInt -> "ExpectingInt"
+ Parser.ExpectingHex -> "ExpectingHex"
+ Parser.ExpectingOctal -> "ExpectingOctal"
+ Parser.ExpectingBinary -> "ExpectingBinary"
+ Parser.ExpectingFloat -> "ExpectingFloat"
+ Parser.ExpectingNumber -> "ExpectingNumber"
+ Parser.ExpectingVariable -> "ExpectingVariable"
+ Parser.ExpectingSymbol string -> "ExpectingSymbol \""++string++"\""
+ Parser.ExpectingKeyword string -> "ExpectingKeyword \""++string++"\""
+ Parser.ExpectingEnd -> "ExpectingEnd"
+ Parser.UnexpectedChar -> "UnexpectedChar"
+ Parser.Problem string -> "Problem \""++string++"\""
+ Parser.BadRepeat -> "BadRepeat"
+ -- get the csv string from html document
+ data = String.dropLeft 15 input.data -- the parser can't parse the <!DOCTYPE HTML>-part of Html
+ htmlDataResult = Html.Parser.run data
+ dataInCorrectFormat =
+ case htmlDataResult of
+ Ok htmlData ->
+ let allTexts = findallTexts htmlData
+
+ findallTexts : List Html.Parser.Node -> List String
+ findallTexts nodes = List.concat <| List.map2 findallTextsHelper nodes <| List.repeat (List.length nodes) []
+ findallTextsHelper : Html.Parser.Node -> List String -> List String
+ findallTextsHelper outerNode texts =
+ case outerNode of
+ Html.Parser.Text string -> string::texts
+ Html.Parser.Element string attrs childNodes ->
+ List.concat
+ [ List.concat <| List.map2 findallTextsHelper childNodes <| List.repeat (List.length childNodes) []
+ , texts
+ ]
+ Html.Parser.Comment string -> []
+ in -- The longest String should be the csv one
+ Maybe.withDefault "There is no text in this html-file." <| list_Last <| List.sortBy String.length allTexts
+ Err errorList -> "Input was Html-file, but Error while Parsing it: "++(deadEndsToString errorList)++"\t\r\n"
+ ++"Html-file:\t\r\n"++data
+
+ in {input | data = dataInCorrectFormat }
+ else input
+
+csvString_to_data : String -> List ( String, Maybe Float )
+csvString_to_data csvRaw =
+ Csv.parse csvRaw
+ |> Csv.Decode.decodeCsv decodeStockDay
+ |> Result.toMaybe
+ |> Maybe.withDefault []
+
+decodeStockDay : Csv.Decode.Decoder (( String, Maybe Float ) -> a) a
+decodeStockDay =
+ Csv.Decode.map (\a b -> ( a, Just b ))
+ (Csv.Decode.field "Date" Ok
+ |> Csv.Decode.andMap
+ (Csv.Decode.field "Open"
+ (String.toFloat >> Result.fromMaybe "error parsing string")
+ )
+ )
+
+prepareData : List Data -> List Data
+prepareData rawData =
+ let startDate = Date.fromCalendarDate 1980 Dec 23
+ untilDate = Date.fromCalendarDate 2011 Jun 9
+ allDates = Dict.fromList <|
+ List.map
+ (\date -> (Date.toIsoString date, Nothing))
+ <| Date.range Date.Day 1 startDate untilDate
+
+ rawDictData : List ( Dict.Dict String (Maybe Float) )
+ rawDictData = List.map Dict.fromList <| List.map .data rawData
+
+ resultDictData : List ( Dict.Dict String (Maybe Float) )
+ resultDictData = List.map (\rawDict -> Dict.union rawDict allDates) rawDictData
+
+ resultDataList = List.map Dict.toList resultDictData
+
+ resultWithoutWeekends = List.map (\data -> List.filter (\(dateString,mayFloat) ->
+ case Date.fromIsoString dateString of
+ Ok date -> if List.member (Date.weekdayNumber date) [6,7]
+ then False else True
+ Err _ -> True
+ ) data) resultDataList
+
+ in List.map2 (\raw result -> {raw | data = result}) rawData resultWithoutWeekends
+
+dataToString : List ( String, Maybe Float ) -> String
+dataToString dataList =
+ List.foldr (++) ""
+ <| List.map
+ (\elem -> (Tuple.first elem)++" "++
+ (let rightString = String.fromFloat <| Maybe.withDefault -1234879231 <| Tuple.second elem
+ in if rightString == "-1234879231" then "No Data" else rightString
+ )++"\n"
+ )
+ dataList
+
+-- Für Zeichnen
+
+augmentLevel : List ( Int, Int ) -> List ( ( Int, Int ), ( Int, Int ) )
+augmentLevel level =
+ let next : List ( Int, Int )
+ next = List.foldr
+ (\( w, h ) nl ->
+ let ( nlx, nly ) =
+ case nl of
+ [] -> ( 1, 1 )
+ ( x, y ) :: _ -> ( x, y )
+ in ( w * nlx, h * nly ) :: nl
+ )
+ []
+ level
+ in List.map2 Tuple.pair level (List.append (List.drop 1 next) [ ( 0, 0 ) ])
+
+coordsListToListOfLines : List (Int, Int) -> List (List Int)
+coordsListToListOfLines coords = -- requires the coords to fill the whole place minX - maxX, minY - maxY otherwise there will be -1 elements
+ let minX = Maybe.withDefault 0 <| List.minimum <| List.map Tuple.first coords
+ maxX = Maybe.withDefault (List.length coords) <| List.maximum <| List.map Tuple.first coords
+ minY = Maybe.withDefault 0 <| List.minimum <| List.map Tuple.second coords
+ maxY = Maybe.withDefault (List.length coords) <| List.maximum <| List.map Tuple.second coords
+ initialLines = List.repeat (maxY-minY+1) (List.repeat (maxX-minX+1) -1)
+ coordsListToListOfLinesHelper : List (Int,(Int, Int)) -> List (List Int) -> List (List Int)
+ coordsListToListOfLinesHelper indexedCoords lines =
+ case indexedCoords of
+ [] -> lines
+ (i,(x,y))::cs -> coordsListToListOfLinesHelper cs <| list_set lines (y-minY) (list_set (list_get lines (y-minY)) (x-minX) i)
+ in coordsListToListOfLinesHelper (List.indexedMap Tuple.pair coords) initialLines
+
+type alias LoopRec =
+ { xOuterLoop : Int, yLoop : Int, outerResult : List ( Int, Int ) }
+
+drawArrangement : Arrangement -> List ( ( Int, Int ), ( Int, Int ) ) -> List ( Int, Int )
+drawArrangement arrangement lvl =
+ let drawLineByLine : Int -> Int -> List ( ( Int, Int ), ( Int, Int ) ) -> List ( Int, Int )
+ drawLineByLine x y level =
+ case level of
+ [] -> [ ( x, y ) ]
+ ( ( width, height ), ( next_x, next_y ) ) :: reducedLevel ->
+ let temp = List.foldl
+ (\_ { xOuterLoop, yLoop, outerResult } ->
+ let innerResult = List.foldl
+ (\_ ( xLoop, result ) ->
+ ( xLoop + next_x
+ , List.append
+ result
+ (drawLineByLine xLoop yLoop reducedLevel)
+ )
+ )( xOuterLoop, [] ) <| List.range 1 width
+ in LoopRec xOuterLoop
+ (yLoop + next_y)
+ (List.append outerResult (Tuple.second innerResult))
+ )(LoopRec x y []) <| List.range 1 height
+ in temp.outerResult
+ drawForthLoop : Int -> Int -> List ( ( Int, Int ), ( Int, Int ) ) -> List ( Int, Int )
+ drawForthLoop x y level =
+ case level of
+ [] -> [ ( x, y ) ]
+ ( ( width, height ), ( next_x, next_y ) ) :: reducedLevel ->
+ let temp = List.foldl
+ (\h { xOuterLoop, yLoop, outerResult } ->
+ let isOdd = modBy 2 h == 0
+ xOperation = if isOdd then (-) else (+)
+ xLoopOperation = if isOdd then (+) ((width-1)*next_x) else (+) 0
+ innerResult = List.foldl
+ (\_ ( xLoop, result ) ->
+ ( xOperation xLoop next_x
+ , List.append
+ result
+ (drawForthLoop (xLoopOperation xLoop) yLoop reducedLevel)
+ )
+ )( xOuterLoop, [] ) <| List.range 1 width
+ in LoopRec xOuterLoop
+ (yLoop + next_y)
+ (List.append outerResult (Tuple.second innerResult))
+ )(LoopRec x y []) <| List.range 1 height
+ in temp.outerResult
+ in case arrangement of
+ Line_By_Line -> drawLineByLine 0 0 lvl
+ Forth_Loop -> drawForthLoop 0 0 lvl
+
+drawDimension : ( Int, Int ) -> List ( Int, Int ) -> List ( String, Maybe Float ) -> Svg Msg
+drawDimension (w,h) pixelMapping data =
+ let scaleTo01 = data
+ |> List.map Tuple.second
+ |> Maybe.Extra.values
+ |> Statistics.extent
+ |> Maybe.withDefault ( 0, 1 )
+ |> Scale.linear ( 0, 1 )
+ -- without this multiplier the last col and last row don't fits in viewbox w h
+ (minX,maxX) = Maybe.withDefault (0,0) <| Statistics.extent <| List.map toFloat <| List.map Tuple.first pixelMapping
+ (minY,maxY) = Maybe.withDefault (0,0) <| Statistics.extent <| List.map toFloat <| List.map Tuple.second pixelMapping
+ w_multiplier = (maxX-minX-1)/(maxX-minX)
+ h_multiplier = (maxY-minY-1)/(maxY-minY)
+
+ ( scaleW, scaleH ) =
+ pixelMapping
+ |> List.map (Tuple.mapBoth toFloat toFloat)
+ |> (\l -> ( List.map Tuple.first l, List.map Tuple.second l ))
+ |> Tuple.mapBoth
+ (Statistics.extent >> Maybe.withDefault ( 0.0, 100.0 ) >> Scale.linear ( 0, (*) w_multiplier <| toFloat w ))
+ (Statistics.extent >> Maybe.withDefault ( 0.0, 100.0 ) >> Scale.linear ( 0, (*) h_multiplier <| toFloat h ))
+
+ drawPixel : ( Int, Int ) -> ( String, Maybe Float ) -> Svg Msg
+ drawPixel ( pixelX, pixelY ) ( label, value ) =
+ rect[ TypedSvg.Attributes.x <| TypedSvg.Types.Px <| Scale.convert scaleW <| toFloat pixelX
+ , TypedSvg.Attributes.y <| TypedSvg.Types.Px <| Scale.convert scaleH <| toFloat pixelY
+ , TypedSvg.Attributes.width <| TypedSvg.Types.Px <| Scale.convert scaleW 1
+ , TypedSvg.Attributes.height <| TypedSvg.Types.Px <| Scale.convert scaleH 1
+ , TypedSvg.Attributes.fill <| TypedSvg.Types.Paint
+ <| Maybe.withDefault Color.darkGray
+ <| Maybe.map (Scale.Color.infernoInterpolator << Scale.convert scaleTo01) value
+ ][]
+ in g [] <| List.map2 drawPixel pixelMapping data
+
+-- Working with Lists
+
+list_Last : List a -> Maybe a
+list_Last list =
+ case list of
+ [] -> Nothing
+ x::[] -> Just x
+ x::xs -> list_Last xs
+
+list_next : List a -> List a
+list_next list = List.append (List.drop 1 list) (List.take 1 list)
+
+list_get : List a -> Int -> a -- returns the listelement at index i. creates endless loop if length list < i+1
+list_get list i =
+ case list of
+ [] -> list_get list i
+ x::xs -> if i == 0 then x else list_get xs (i-1)
+
+list_set : List a -> Int -> a -> List a -- resets at index i the element with e. does nothing if length list < i+1
+list_set list i e =
+ case list of
+ [] -> []
+ x::xs -> if i==0 then e::xs else x::(list_set xs (i-1) e)
+
+-- Working with Errors
+httpErrorToString : Http.Error -> String
+httpErrorToString err =
+ "Http-Error: "++(
+ case err of
+ Http.BadUrl string -> "BadUrl "++string
+ Http.Timeout -> "Timeout"
+ Http.NetworkError -> "NetworkError"
+ Http.BadStatus int -> "BadStatus "++(String.fromInt int)
+ Http.BadBody string -> "BadBody "++string
+ )
\ No newline at end of file