gtkhst:
-------

gtkhst is a collection of gobjects and gtk+ widgets, used to display
them, that allow an easy histograming and monitoring of data. 


The gobjects are:

    HstStats:
    
    It is an object that computes the statistics of a given pair of
    quantities. It is mainly used by the histogram objects to compute
    the mean, RMS and correlation of the histogrammed quantities. 

    HstFunction:
    This is an object that wraps a 1D function and a range of validity
    for that function. The range is defined as an interval of
    evaluation and the number of points in which the function is
    evaluated. It is the basis for defining an axis in a Histogram.

    HstFunction2D:
    I the 2D version of HstFunction. 

    HstHistogram:
    It represents a 1D histogram. It derives from HstFunction.

    HstHistogram2D:
    A 2D histogram

    HstTracer:
    It derives from HstHistogram and is used to display the time
    evolution of a given quantity.

The gtkwidgets used to display the above are:

    GtkHistogram:
    It will display a HstFunction object and its derived objects:
       - HstFunction
       - HstHistogram
       - HstTracer

    GtkHistogram2D:
    It will display a HstFunction2D object and its derived objects:
       - HstFunction2D
       -HstHistogram2D

    GtkGauge:
    This is just a widget that will show the value of a given
    quantity.

    




