Probability distribution / Histogram |
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Accessible through menu option *Signal tools/Probability distribution/Histogram *or toolbar
button.

Probability distribution/Histogram function divides signal’s amplitude range in consecutive
segments (**bins**) and calculates the probability of signal value to fall into a certain segment or the
count of value occurrences falling in that segment.

The resulting curve displays bins (i.e. their lower limit values) at the X-axis and probability in [0,1]
range or number of values on Y-axis.

Following settings can be made in the corresponding dialog :

Number of bins is a crucial settings for the calculation of distribution /histogram graphics. It
determines in how many segments will *SIGVIEW *divide signal’s
amplitude range into. You can let *SIGVIEW *determine that number **automatically **by using one of following **algorithms**:

· **Square Root**: number of bins is equal to sqrt( number_of_samples )

· **Sturge's Rule**: number of bins is equal to log_{2}( number_of_samples ) + 1

· **Scott's Rule**: number of bins is equal to 3.49 * stdev( input_signal ) /
number_of_samples^(1/3)

You can also set number of bins manually to a fixed value (in the range 5...10000)

By using *Properties...* option in the context menu on already created *Probability distribution /
Histogram* window, you can change any of calculation parameter and recalculate the content of
the window.