| append.param | Used in pv... | 
| collapse | A simplied version of paste. | 
| esse | Checks whether something exists. | 
| field.exists | Checks whether a field exists in a dataset. | 
| getHead | Return the head html. | 
| getTail | Return the tail html. | 
| is.webvis | Checks whether something is a webvis object. | 
| is.webvis.flat | Checks whether something is a webvis... | 
| is.webvis.param | Checks whether something is a webvis... | 
| new.webvis | Create a new webvis object to store each layer of the... | 
| plot.webvis | Simplified plot function for web vis plots. | 
| pv.area | Add a bar to the visualization. | 
| pv.bar | Add a bar to the visualization. | 
| pv.chart | Add a chart to the visualization. | 
| pv.data | Converts R data into Protovis data. | 
| pv.dataset | Add a dataset as a variable to the visualization. | 
| pv.dot | Add a dot to the visualization. | 
| pv.image | Add an image to the visualization. | 
| pv.label | Add a label to the visualization. | 
| pv.line | Add a line to the visualization. | 
| pv.mark | Generic function for all Protovis mark types. | 
| pv.panel | A protovis panal. | 
| pv.param | A protovis mark parameter. | 
| pv.parse | Takes a parameter and a webvis object and parses them. | 
| pv.rule | Add an rule to the visualization. | 
| pv.scale | A scaling function for protovis. | 
| pv.wedge | Add a wedge to the visualization (for pie charts, etc). | 
| render.webvis | Create the final visualization from the webvis object. | 
| unfold.webvis | Unfolds the visualization tree structure into a flat form. | 
| webvis | Add a new layers to a visualization. | 
| webvis-package | Web graphics for R. | 
| webvis.theme | Creates a theme to be used by a webvis chart object. | 
| webvisToHTML | Convert webvis to HTML. | 
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