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examples/python/xw22.py

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    # Create data to be contoured

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    r = 0.5+arange(nr)

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    r.shape = (-1,1)

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    theta = (2.*pi/float(ntheta-1))*(0.5+arange(ntheta-1))

 

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    theta = (2.*pi/float(ntheta-1))*(0.5+arange(ntheta))

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    xg = r*cos(theta)

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    yg = r*sin(theta)

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    pllab("(x)", "(y)", "#frPLplot Example 22 - potential gradient vector plot")

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    # Plot contours of the potential

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    dz = (zmax-zmin)/float(nlevel)

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    clevel = zmin + (arange(20)+0.5)*dz

 

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    clevel = zmin + (arange(nlevel)+0.5)*dz

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    du = (umax-umin)/float(nlevel)

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    clevelu = umin + (arange(20)+0.5)*du

 

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    clevelu = umin + (arange(nlevel)+0.5)*du

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    dv = (vmax-vmin)/float(nlevel)

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    clevelv = vmin + (arange(20)+0.5)*dv

 

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    clevelv = vmin + (arange(nlevel)+0.5)*dv

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    plcol0(3)

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    pllsty(2)

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