[Haskell-cafe] Matlab Style Logic Operations ala V1.*(V2>0) on Vectors and Matrices with HMatrix ??

gutti philipp.guttenberg at gmx.net
Mon Dec 20 22:49:29 CET 2010

Hi all, 

In Matlab the following line of code:
V3 = V1.*(V2>0) 

(V2>0) gives a Bool-Vector with ones (trues) and zero's where elements 
of V2 are > 0; Then this Bool vector is used to multiply all elements in V1
to zero
where the condition V2>0 is not fulfilled. 

How can I do that in Haskell ?  (I haven't seen bol operations or mapping
functions into vectors, arrays
in the HMatrix.pdf).

. -- Many thanks in advance Phil

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