Chart-1.4: A library for generating 2D Charts and Plots

Copyright(c) Hitesh Jasani, 2008, Malcolm Wallace 2011, Tim Docker 2014
LicenseBSD3
Safe HaskellNone
LanguageHaskell98

Graphics.Rendering.Chart.SparkLine

Contents

Description

Sparklines are mini graphs inspired by Edward Tufte; see http://www.edwardtufte.com/bboard/q-and-a-fetch-msg?msg_id=0001OR and http://en.wikipedia.org/wiki/Sparkline for more information.

The original implementation (by Hitesh Jasani) used the gd package as a backend renderer, and is still available at http://hackage.haskell.org/package/hsparklines.

The present version integrates with the Chart package, in the sense that Sparklines are just another kind of (ToRenderable a => a), so they can be composed into grids and used with the rest of Chart.

dp :: [Double]
dp = [24,21,32.3,24,15,34,43,55,57,72,74,75,73,72,55,44]

sl = SparkLine barSpark dp
fopts = FileOptions (sparkSize sl) PNG
renderableToFile fopts (sparkLineToRenderable sl) "bar_spark.png" 

Synopsis

SparkLine type

data SparkLine Source

A sparkline is a single sequence of data values, treated as y-values. The x-values are anonymous and implicit in the sequence.

Constructors

SparkLine 

Drawing options

data SparkOptions Source

Options to render the sparklines in different ways.

Constructors

SparkOptions 

Fields

so_smooth :: Bool

smooth or bars

so_step :: Int

step size

so_height :: Int

graph height (pixels)

so_limits :: (Double, Double)

data point limits

so_bgColor :: Colour Double

background color

so_minColor :: Colour Double

color of minimum datapoint

so_maxColor :: Colour Double

color of maximum datapoint

so_lastColor :: Colour Double

color of last datapoint

so_minMarker :: Bool

display minimum marker

so_maxMarker :: Bool

display maximum marker

so_lastMarker :: Bool

display last marker

Instances

smoothSpark :: SparkOptions Source

Default options for a smooth sparkline.

barSpark :: SparkOptions Source

Default options for a barchart sparkline.

Size calculation

sparkSize :: SparkLine -> (Int, Int) Source

Return the width and height of the SparkLine.

Rendering function

renderSparkLine :: SparkLine -> ChartBackend (PickFn ()) Source

Render a SparkLine to a drawing surface.

sparkLineToRenderable :: SparkLine -> Renderable () Source

Create a renderable from a SparkLine.

sparkWidth :: SparkLine -> Int Source

Compute the width of a SparkLine, for rendering purposes.