Safe Haskell	None

Graphics.Rendering.Chart.Axis

Description

Synopsis

Documentation

data Axis Source

The concrete data type for an axis

Constructors

Axis

Fields

axis_viewport :: Range -> Double -> Double: The axis_viewport function maps values into device cordinates.
axis_title :: String: The title string to be displayed on the axis. An empty string means no title.
axis_ticks :: [(Double, Double)]: The tick marks on the axis as pairs. The first element is the position on the axis (in viewport units) and the second element is the length of the tick in output coordinates. The tick starts on the axis, and positive number are drawn towards the plot area.
axis_labels :: [(Double, String)]: The labels on an axis as pairs. The first element is the position on the axis (in viewport units) and the second is the label text string.
axis_grid :: [Double]: The positions on the axis (in viewport units) where we want to show grid lines.
axis_label_gap :: Double: How far the labels are to be drawn from the axis.
axis_title_style :: CairoFontStyle
axis_line_style :: CairoLineStyle
axis_label_style :: CairoFontStyle
axis_grid_style :: CairoLineStyle

type AxisFn = [Double] -> Maybe Axis Source

Function type to generate an optional axis given a set of points to be plotted against that axis.

type AxesFn = [Double] -> [Double] -> (Maybe Axis, Maybe Axis)Source

Function type to generate a pair of axes (either top and bottom, or left and right), given the set of points to be plotted against each of them.

data AxisT Source

Constructors

AxisT RectEdge Axis

Instances

ToRenderable AxisT

minsizeAxis :: AxisT -> CRender RectSize Source

axisOverhang :: AxisT -> CRender (Double, Double)Source

Calculate the amount by which the labels extend beyond the ends of the axis

renderAxis :: AxisT -> Rect -> CRender ()Source

axisMapping :: AxisT -> Rect -> (Double, Double, Double, Double, Vector, Double -> Point)Source

renderAxisGrid :: Rect -> AxisT -> CRender ()Source

steps :: Double -> Range -> [Rational]Source

chooseStep :: Double -> Range -> Rational Source

explicitAxis :: Maybe Axis -> AxisFn Source

Explicitly specify an axis

autoAxis :: (Double -> [Char]) -> ((Double, Double) -> Range -> Double -> Double) -> ([Rational], [Rational], [Rational]) -> Axis -> Maybe Axis Source

data LinearAxisParams Source

Constructors

LinearAxisParams
Fields la_labelf :: Double -> String The function used to show the axes labels la_nLabels :: Int The target number of labels to be shown la_nTicks :: Int The target number of ticks to be shown la_gridAtMinor :: Bool If True, the grid is shown at the label values, otherwise the otherwise the grid is shown at the tick values

defaultLinearAxis :: LinearAxisParams Source

autoScaledAxis' :: LinearAxisParams -> Axis -> AxisFn Source

Generate a linear axis automatically. The supplied axis is used as a template, with the viewport, ticks, labels and grid set appropriately for the data displayed against that axies. The resulting axis will only show a grid if the template has some grid values.

autoScaledAxis :: Axis -> AxisFn Source

Generate a linear axis automatically. Same as autoScaledAxis', but with labels generated with showD (showD is show for doubles, but with any trailing .0 removed)

showD :: Show a => a -> [Char]Source

log10 :: Floating a => a -> aSource

frac :: (Integral t, RealFrac t1) => t1 -> (t, t1)Source

lmap :: (Double, Double) -> Range -> Double -> Double Source

logTicks :: Range -> ([Rational], [Rational], [Rational])Source

autoScaledLogAxis' :: (Double -> String) -> Axis -> AxisFn Source

Generate a log axis automatically. The supplied axis is used as a template, with the viewport, ticks, labels and grid set appropriately for the data displayed against that axies. The resulting axis will only show a grid if the template has some grid values.

autoScaledLogAxis :: Axis -> AxisFn Source

Generate a log axis automatically. Same as autoScaledLogAxis', but with labels generated with showD (showD is show for doubles, but with any trailing .0 removed)

independentAxes :: AxisFn -> AxisFn -> AxesFn Source

Show independent axes on each side of the layout

linkedAxes :: AxisFn -> AxesFn Source

Show the same axis on both sides of the layout

linkedAxes' :: AxisFn -> AxesFn Source

Show the same axis on both sides of the layout, but with labels only on the primary side

defaultAxisLineStyle :: CairoLineStyle Source

defaultGridLineStyle :: CairoLineStyle Source

defaultAxis :: Axis Source

doubleFromLocalTime :: LocalTime -> Double Source

Map a LocalTime value to a plot cordinate

localTimeFromDouble :: Double -> LocalTime Source

Map a plot cordinate to a LocalTime

type TimeSeq = LocalTime -> ([LocalTime], [LocalTime])Source

TimeSeq is a (potentially infinite) set of times. When passes a reference time, the function returns a a pair of lists. The first contains all times in the set less than the reference time in decreasing order. The second contains all times in the set greater than or equal to the reference time, in increasing order.

coverTS :: Ord a => (a -> ([a], [a])) -> a -> a -> [a]Source

enumerateTS :: Ord a => (a -> ([a], [a])) -> a -> a -> [a]Source

elemTS :: Eq a => a -> (a -> (t, [a])) -> Bool Source

type TimeLabelFn = LocalTime -> String Source

How to display a time

timeAxis :: TimeSeq -> TimeSeq -> TimeLabelFn -> Axis -> AxisFn Source

Create an AxisFn to for a time axis. The first TimeSeq sets the minor ticks, and the ultimate range will aligned to it's elements. The second TimeSeq sets the labels and grid. The TimeLabelFn is used to format LocalTimes for labels. The values to be plotted against this axis can be created with doubleFromLocalTime

days :: TimeSeq Source

A TimeSeq for calendar days

months :: TimeSeq Source

A TimeSeq for calendar months

years :: TimeSeq Source

A TimeSeq for calendar years

autoTimeAxis :: Axis -> AxisFn Source

Automatically choose a suitable time axis, based upon the time range of data. The values to be plotted against this axis can be created with doubleFromLocalTime