using logninv to have a distribution

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21did21
21did21 2011-12-30
hello world,
I watched the "Logninv" but I did not understand how to use it ...
this is what I try to do:
I'd like to have several dimensions of samples whose total number of samples is 1e22. All these samples are distributed in various sizes as the average size is 9-third
I did not understand how to do this with this function logninv i don't understand with this don't works: logninv(1e22,3e-9,0.5) with 0,5 the standart deviation
thanks for your help

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