[ialblshow] [Up] [iasplot] Visualization

iaplot
Plot a function.

Synopsis

g, d = iaplot( x = 0, y = None, filename = None )

Implemented in Python.

Input

Image. Gray-scale (uint8 or uint16) or binary image (logical).

Default: 0

Image. Gray-scale (uint8 or uint16) or binary image (logical).

f(x).

Default: None

filename

String.

Name of the postscript file.

Default: None

Output

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

Description

Plot a 2D function y=f(x).

Examples

>>> import Numeric

>>> x = Numeric.arange(0, 2*Numeric.pi, 0.1)

>>> y = Numeric.sin(x)

>>> g, d = iaplot(x,y)

>>> g('set data style impulses')

>>> g('set grid')

>>> g('set xlabel "X values" -20,0')

>>> g('set ylabel "Y values"')

>>> g('set title "Example Plot"')

>>> g.plot(d, 'cos(x)')

>>>


x,y	d, 'cos(x)'

Source Code
        def iaplot(x=0, y=None, filename=None):
    import Numeric
    try:
        import Gnuplot
        g = Gnuplot.Gnuplot(debug=1)
        g('set data style lines')
        x = Numeric.ravel(x)
        if not y:
            y = x
            x = Numeric.arange(len(y))
        else:
            y = Numeric.ravel(y)
        d = Gnuplot.Data(x, y)
        g.plot(d)
        if filename:
            g.hardcopy(filename, mode='portrait', enhanced=1, color=1)
    except:
        g,d = None,None
    return g, d
    
      

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