Not currently, but you can create your own new AbstractArray types. In this case, https://github.com/tanmaykm/ChainedVectors.jl might be a good model for how to proceed.
Best, --Tim On Tuesday, March 17, 2015 01:35:03 AM Ján Dolinský wrote: > Hi, > > Is it possible to create a view which refers to e.g. two different matrices > ? I am on Julia v0.36. > > X = rand(1000,1000) > Y = rand(1000,100) > > @time a = view(X, :, :) > elapsed time: 6.576e-6 seconds (184 bytes allocated) > > @time b = view(Y, :, :) > elapsed time: 5.83e-6 seconds (168 bytes allocated) > > @time c = [a b] > elapsed time: 0.080207052 seconds (8802560 bytes allocated) > > a and b are apparently "views" and little memory is allocated. Is it > possible to create a composite view which refers to X and Y at the same > time ? Expression "[a b]" seems to create a copy of X and Y. > > My motivation is that I am concatenating two matrices in a loop where the > first one is usually fixed and the other one may have different number of > columns at each iteration. > > Thanks, > Jan
