MATLAB: I have a problem with LU

luMATLABmatlab on apple mac book

I run Matlab home and I have run these commands n=6
n =
     6
C= randn(n)
C =
    0.5377   -0.4336    0.7254    1.4090    0.4889    0.8884
    1.8339    0.3426   -0.0631    1.4172    1.0347   -1.1471
   -2.2588    3.5784    0.7147    0.6715    0.7269   -1.0689
    0.8622    2.7694   -0.2050   -1.2075   -0.3034   -0.8095
    0.3188   -1.3499   -0.1241    0.7172    0.2939   -2.9443
   -1.3077    3.0349    1.4897    1.6302   -0.7873    1.4384
[L,U,P,Q,R] = lu(C) {Error using href="matlab:matlab.internal.language.introspective.errorDocCallback('lu')" style="font-weight:bold">lu</a Too many output arguments. } Why? the syntax is the one of your help page on lu and my licence is on my mac book air. Thanks
Mario Arioli
mario.arioli@gmail.com

Best Answer

The four and five-output syntax are only applicable for sparse input matrix.
You can try by converting your dense matrix to sparse:
[L,U,P,Q,R] = lu(sparse(C))
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