[julia-users] Conditional works like on the selected columns of the matrix
I have a logical vector t julia> t 1x4 BitArray{2}: true false false false and matrix v julia> v 4x4 Array {Float64, 2}: -0.0018187 -0.18174 0.982684 0.0360478 -0.018408 0.98314 0.1819 -0.00297265 -0.995394 -0.0167994 -0.00839779 0.0940118 0.0940681 0.0111097 -0.0342677 0.994914 How quickly multiplied by -1 only the columns where vactor t = true ? Paul
Re: [julia-users] Conditional works like on the selected columns of the matrix
scale!(v, 1 .- 2t) On Sat, Apr 19, 2014 at 5:11 AM, paul analyst wrote: > I have a logical vector t > julia> t > 1x4 BitArray{2}: > true false false false > > and matrix v > julia> v > 4x4 Array {Float64, 2}: > -0.0018187 -0.18174 0.982684 0.0360478 > -0.018408 0.98314 0.1819 -0.00297265 > -0.995394 -0.0167994 -0.00839779 0.0940118 >0.0940681 0.0111097 -0.0342677 0.994914 > > How quickly multiplied by -1 only the columns where vactor t = true ? > Paul >
Re: [julia-users] Conditional works like on the selected columns of the matrix
Big thx, what is "-2" before t ? Paul W dniu sobota, 19 kwietnia 2014 14:47:40 UTC+2 użytkownik Stefan Karpinski napisał: > > scale!(v, 1 .- 2t) > > > On Sat, Apr 19, 2014 at 5:11 AM, paul analyst > > wrote: > >> I have a logical vector t >> julia> t >> 1x4 BitArray{2}: >> true false false false >> >> and matrix v >> julia> v >> 4x4 Array {Float64, 2}: >> -0.0018187 -0.18174 0.982684 0.0360478 >> -0.018408 0.98314 0.1819 -0.00297265 >> -0.995394 -0.0167994 -0.00839779 0.0940118 >>0.0940681 0.0111097 -0.0342677 0.994914 >> >> How quickly multiplied by -1 only the columns where vactor t = true ? >> Paul >> > >
Re: [julia-users] Conditional works like on the selected columns of the matrix
Broadcasting subtraction of 2 times t from 1. On Sat, Apr 19, 2014 at 3:42 PM, paul analyst wrote: > Big thx, > what is "-2" before t ? > Paul > > W dniu sobota, 19 kwietnia 2014 14:47:40 UTC+2 użytkownik Stefan Karpinski > napisał: >> >> scale!(v, 1 .- 2t) >> >> >> On Sat, Apr 19, 2014 at 5:11 AM, paul analyst wrote: >> >>> I have a logical vector t >>> julia> t >>> 1x4 BitArray{2}: >>> true false false false >>> >>> and matrix v >>> julia> v >>> 4x4 Array {Float64, 2}: >>> -0.0018187 -0.18174 0.982684 0.0360478 >>> -0.018408 0.98314 0.1819 -0.00297265 >>> -0.995394 -0.0167994 -0.00839779 0.0940118 >>>0.0940681 0.0111097 -0.0342677 0.994914 >>> >>> How quickly multiplied by -1 only the columns where vactor t = true ? >>> Paul >>> >> >>