MATLAB: How can ı creat poisson random variables

MATLAB

lambda = 75;

N = 0:200; %Number of people

P = poisspdf(N,lambda);

E=lambda;%expected value

V=lambda; %variance

bar(N,P,1);

xlabel('Observation');

ylabel('Probability');

I have a poisson distribution but I need to create poisson random numbers intead of N.CAn someone help me?

Thanks!

Best Answer

You can generate random number by using poissonrnd function, like;

lambda = 75;
r = poissrnd(lambda);

Or, if you want to generate 1000-by-1 random number array, you can do it by:

r = poissrnd(lambda,1000,1);

Related Solutions

MATLAB: Random Numbers generation from pareto distibution and generalized exponential distrbution

n = 100;
x = rand(n,1);
y_ge = mu-log(1-x.^(1/alpha))/lambda;
y_p = lambda*(1-x).^(-1/alpha);

generates 100 random numbers for the generalized exponential and the pareto distribution.

Best wishes

Torsten.

MATLAB: Someone help me to fix the problem

I think you need to use the unique function here. Something that is important to note is that the bar chart requires r to be unique values. In addition, because of that, you need to count the number of times that the counts occur. Also, because you want to plot the probability, you want to divide by the number of total occurences in the set. This is reflected in the code below:

% Generating the random dataset
lambda =75;
 for i=1:1000
    r(i) = poissrnd(lambda);
 end
 P = poisspdf(r,lambda); 
[M,V] = poisstat(lambda);
counts = hist(r, unique(r));            % unique selects the number of unique elements
                                        % hist counts the number of elements at each unique value
bar(unique(r), counts/1000)             % bar chart plots the counts
                                        % because you have 1000 elements, you divide counts by 1000 to get the probability
xlabel('Observation');
ylabel('Probability');

Best Answer

Related Solutions

MATLAB: Random Numbers generation from pareto distibution and generalized exponential distrbution

MATLAB: Someone help me to fix the problem

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