Function Reference: poisspdf

statistics: y = poisspdf (x, lambda)

Poisson probability density function (PDF).

For each element of x, compute the probability density function (PDF) of the Poisson distribution with rate parameter lambda. The size of y is the common size of x and lambda. A scalar input functions as a constant matrix of the same size as the other inputs.

Further information about the Poisson distribution can be found at https://en.wikipedia.org/wiki/Poisson_distribution

See also: poisscdf, poissinv, poissrnd, poissfit, poisslike, poisstat

Source Code: poisspdf

Example: 1

  

 ## Plot various PDFs from the Poisson distribution
 x = 0:20;
 y1 = poisspdf (x, 1);
 y2 = poisspdf (x, 4);
 y3 = poisspdf (x, 10);
 plot (x, y1, "*b", x, y2, "*g", x, y3, "*r")
 grid on
 ylim ([0, 0.4])
 legend ({"λ = 1", "λ = 4", "λ = 10"}, "location", "northeast")
 title ("Poisson PDF")
 xlabel ("values in x (number of occurences)")
 ylabel ("density")
plotted figure