Retrieve how many dimensions this dataset refers to. Typically, for every
point, this method informs JavaPlot how many "columns" of data this point
has. Make sure that every point has at least as many dimensions as what
is reported here .
the number of dimensions
java.lang.String getPointValue(int point,
Retrieve data information from a point. To retrieve information for each
point, a continuous call to this method will be executed, keeping the
item number constant and increasing the dimension.
point - The point number
dimension - The point dimension (or "column") to request data from