The library also provides methods for fitting a linear or quadratic
curve and for fitting a probability distribution on the histogram
data.
In both cases, the belonging 
statistic and probability are given.
The following window was obtained by filling a histogram (with a
column width of 0.5) with
10000 samples from the normal distribution with a mean of 5 and a
standard deviation of 1.3. The analysis::normal method
received these parameters, when invoked. If not, the method had
calculated the a and b values from the histogram data.
