.. _plotexample-acoustics-2d-3: 
 
Contour plot with colored contour lines
=======================================

Produce a contour plot of pressure from 2d acoustics example.
    
 

Example generating data: `$CLAW/doc/sphinx/example-acoustics-2d/README.html <../example-acoustics-2d/README.html>`_

Resulting plots: `$CLAW/doc/sphinx/example-acoustics-2d/plots_3/_PlotIndex.html <../example-acoustics-2d/plots_3/_PlotIndex.html>`_

::

    
    #--------------------------
    def setplot(plotdata):
    #--------------------------
        
        """ 
        Specify what is to be plotted at each frame.
        Input:  plotdata, an instance of pyclaw.plotters.data.ClawPlotData.
        Output: a modified version of plotdata.
        
        """ 
    
    
        from pyclaw.plotters import colormaps
    
        plotdata.clearfigures()  # clear any old figures,axes,items data
        
    
        plotfigure = plotdata.new_plotfigure(name='Pressure', figno=0)
    
        # Set up for axes in this figure:
        plotaxes = plotfigure.new_plotaxes()
        plotaxes.xlimits = [-1., 1.]
        plotaxes.ylimits = [-1., 1.]
        plotaxes.title = 'Pressure'
        plotaxes.scaled = True        # so aspect ratio is 1
    
        # Set up for item on these axes:
        plotitem = plotaxes.new_plotitem(plot_type='2d_contour')
        plotitem.plot_var = 0
        plotitem.contour_nlevels = 21
        plotitem.contour_min = 0.0
        plotitem.contour_max = 3.0
    
        # Use a custom colormap ranging from blue to red:
        blue_red_cmap = colormaps.make_colormap({0:'b', 1:'r'})
        plotitem.contour_cmap = blue_red_cmap
        plotitem.add_colorbar = True
    
        plotitem.show = True             # show on plot?
        
    
        # Parameters used only when creating html and/or latex hardcopy
        # e.g., via pyclaw.plotters.frametools.printframes:
    
        plotdata.printfigs = True                # print figures
        plotdata.print_format = 'png'            # file format
        plotdata.print_framenos = 'all'          # list of frames to print
        plotdata.print_fignos = 'all'            # list of figures to print
        plotdata.html = True                     # create html files of plots?
        plotdata.html_homelink = '../README.html'   # pointer for top of index
        plotdata.latex = True                    # create latex file of plots?
        plotdata.latex_figsperline = 1           # layout of plots
        plotdata.latex_framesperline = 2         # layout of plots
        plotdata.latex_makepdf = True            # also run pdflatex?
    
        return plotdata