Le 10/06/2016 à 15:59, Jens Simon Strom a écrit :
rand(n,1)–rand(n,1) is definitely NOT uniform.
by convolution the density of such a variable seems triangle shaped :
f(x)=1/2-abs(x)/4, if x \in [-2,2]
=0, elsewhere
S.
Jens
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Am 10.06.2016 15:33, schrieb Samuel Gougeon:
Le 10/06/2016 15:21, Carrico, Paul a écrit :
Hi
In order to simulate dimensional tolerances in +/-, I’m using the
following workaround :
n = 100;
a = rand(n,1) – rand(n,1);
Of course I need to increase the N value to the domain … is there a
more “clever” way ?
grand(n,1,"unf",-1,1)
BTW, i am not sure that rand(n,1)–rand(n,1) builds (or keeps) a
uniform distribution over [-1, 1].
Samuel
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Département de Génie Informatique
EA 4297 Transformations Intégrées de la Matière Renouvelable
Université de Technologie de Compiègne - CS 60319
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