[iaplot] [Up] [iashow] Visualization

iasplot
Plot a surface.

Synopsis

g, d = iasplot( x = 0, y = None, z = None, filename = None )

Implemented in Python.

Input

x	Image. Gray-scale (uint8 or uint16) or binary image (logical). x range. Default: `0`
y	Image. Gray-scale (uint8 or uint16) or binary image (logical). y range. Default: `None`
z	Image. Gray-scale (uint8 or uint16) or binary image (logical). object function (z=f(x,y)). Default: `None`
filename	String. Name of the postscript file. Default: `None`

Output

g	String. Gnuplot pointer.
d	String. Gnuplot data.

Description

Plot a 3D function z=f(x,y).

Examples

>>> x = Numeric.arange(35)/2.0

>>> y = Numeric.arange(30)/10.0 - 1.5

>>> def z(x,y): return 1.0 / (1 + 0.01 * x**2 + 0.5 * y**2)

>>> g,d = iasplot(x, y, z)

>>>


x, y, z

>>> f = iaread('lenina.pgm')

>>> k = f[90:195, 70:150]

>>> iashow(k)

(105, 80) Min= 45 Max= 209 Mean=112.957 Std=32.77

>>> g,d = iasplot(k)

>>> g('set view 30,60')

>>> g.splot(d) # surface

>>>

>>> g('set view 0,90')

>>> g('set nosurface') # level curves

>>> g.splot(d)

>>>


k	k


d	d

Source Code
        def iasplot(x=0, y=None, z=None, filename=None):
    import Numeric
    try:
        import Gnuplot
        import Gnuplot.funcutils
        g = Gnuplot.Gnuplot(debug=1)
        g('set parametric')
        g('set data style lines')
        g('set hidden')
        g('set contour base')
        f = Numeric.asarray(x)
        if y is None:
            x = range(f.shape[0])
            y = range(f.shape[1])
            def z(x, y, f=f):
                return f[int(x),int(y)]
        d = Gnuplot.funcutils.compute_GridData(x, y, z, binary=0)
        g.splot(d)
        if filename:
            g.hardcopy(filename, mode='portrait', enhanced=1, color=1)
    except:
        g,d = None,None
    return g, d
    
      

[`iaplot`] [Up] [`iashow`]

iasplot Plot a surface.

Synopsis

Input

Output

Description

Examples

Source Code

iasplot
Plot a surface.