poisson random distributoin with zeros

i want to generat a poisson random vector with mean 2400 and its diminsion(1000,1) and distribut it randomly in a zeros vector(80000,1)

Answer 1

[the cyclist]

If you have the Statistics and Machine Learning Toolbox, then

BIG   = 80000;
SMALL = 1000;

MEAN = 2400;

idx = randsample(1:BIG,SMALL);

output = zeros(BIG,1);
output(idx) = poissrnd(MEAN,SMALL,1);

[Mohamed Ayman]

thank you for your help