Graphics.Rendering.Plot.HMatrix

Compatability module to replace Graphics.Plot of the hmatrix module

Provides all functions from hmatrix's Graphics.Plot as well as those functions appended with H which return a PlotHandle for interactive update.

Plotting functions

mplot :: [Vector Double] -> IO ()

plot several vectors against the first

mplotH :: [Vector Double] -> IO PlotHandle

plot several vectors against the first

plot :: [Vector Double -> Vector Double] -> (Double, Double) -> Int -> IO ()

Draws a list of functions over a desired range and with a desired number of points

> plot [sin, cos, sin.(3*)] (0,2*pi) 1000

plotH :: [Vector Double -> Vector Double] -> (Double, Double) -> Int -> IO PlotHandle

Draws a list of functions over a desired range and with a desired number of points

> plot [sin, cos, sin.(3*)] (0,2*pi) 1000

parametricPlot :: (Vector Double -> (Vector Double, Vector Double)) -> (Double, Double) -> Int -> IO ()

Draws a parametric curve. For instance, to draw a spiral we can do something like:

> parametricPlot (\t->(t * sin t, t * cos t)) (0,10*pi) 1000

parametricPlotH :: (Vector Double -> (Vector Double, Vector Double)) -> (Double, Double) -> Int -> IO PlotHandle

Draws a parametric curve. For instance, to draw a spiral we can do something like:

> parametricPlot (\t->(t * sin t, t * cos t)) (0,10*pi) 1000

imshow :: Matrix Double -> IO ()

imshow shows a representation of a matrix as a gray level image.

greyscaleH :: Matrix Double -> IO PlotHandle

greyscaleH shows a representation of a matrix as a gray level image.

meshdom :: Vector Double -> Vector Double -> (Matrix Double, Matrix Double)

From vectors x and y, it generates a pair of matrices to be used as x and y arguments for matrix functions.

Compatability

matrixToPGM :: Matrix Double -> String

writes a matrix to pgm image file

Gnuplot functions

splot :: (Matrix Double -> Matrix Double -> Matrix Double) -> (Double, Double) -> (Double, Double) -> Int -> IO ()

Draws the surface represented by the function f in the desired ranges and number of points, internally using mesh.

> let f x y = cos (x + y) 
> splot f (0,pi) (0,2*pi) 50    

mesh :: Matrix Double -> IO ()

Draws a 3D surface representation of a real matrix.

> mesh (hilb 20)

In certain versions you can interactively rotate the graphic using the mouse.