|Bill Allombert on Wed, 21 Oct 2015 22:51:06 +0200|
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|Re: Using forvec as fordiv|
On Wed, Oct 21, 2015 at 04:41:47PM -0400, Charles Greathouse wrote: > Given a vectors u and v with #v == #u, what's the easiest way to extract > the elements of v for which the corresponding element of u is nonzero? (All > elements from u will be 0 or 1.) I suggest you look up vecextract. ? vecextract([1,2,3,4,5],fromdigits([1,0,1,0,1],2)) %1 = [1,3,5] Cheers, Bill.