I'm no Julia expert, but I'm pretty certain this fall under the category
"If you Julia to optimize, put your code in a function."
gibson@timaeus$ ~/packages/julia-0.4.0/bin/julia
_
_ _ _(_)_ | A fresh approach to technical computing
(_) | (_) (_) | Documentation: http://docs.julialang.org
_ _ _| |_ __ _ | Type "?help" for help.
| | | | | | |/ _` | |
| | |_| | | | (_| | | Version 0.4.0 (2015-10-08 06:20 UTC)
_/ |\__'_|_|_|\__'_| | Official http://julialang.org/ release
|__/ | x86_64-unknown-linux-gnu
julia> X = rand(2,2)
2x2 Array{Float64,2}:
0.713809 0.0650767
0.916874 0.111741
julia> K = [dot(X[:,i], X[:,j]) for i=1:2, j=1:2]
2x2 Array{Any,2}:
1.35018 0.148905
0.148905 0.0167211
julia> f(X) = [dot(X[:,i], X[:,j]) for i=1:2, j=1:2]
f (generic function with 1 method)
julia> f(X)
2x2 Array{Float64,2}:
1.35018 0.148905
0.148905 0.0167211
John
On Monday, November 9, 2015 at 11:42:15 AM UTC-5, rizal zaini wrote:
>
> My concern is also on parallel code:
>
> julia> K = @parallel [dot(X[:,i], X[:,j]) for i=1:5, j=1:5] 5x5
> DArray{Any,2,Array{Any,2}}: 1.35134 1.36439 1.28474 1.13181 1.07863 1.36439
> 1.40077 1.25708 1.22365 1.08332 1.28474 1.25708 1.54494 0.95311 1.15779
> 1.13181 1.22365 0.95311 1.70348 1.30076 1.07863 1.08332 1.15779 1.30076
> 1.34577
>
> I expect to get a DArray{Float64,2,Array{Float64,2}} rather than
> DArray{Any,2,Array{Any,2}}
>
> Please help.
>
> Rizal
>
> On Mon, Nov 9, 2015 at 9:11 AM, rizal zaini <[email protected]
> <javascript:>> wrote:
>
>> Hi all
>>
>> I want to create matrix containing dot products
>>
>> julia> X = rand(5,5)
>> 5x5 Array{Float64,2}:
>> 0.274799 0.564619 0.915595 0.341059 0.57361
>> 0.0806822 0.293939 0.379279 0.608582 0.652441
>> 0.264678 0.532751 0.289088 0.457759 0.492777
>> 0.33856 0.495587 0.499099 0.548237 0.402534
>> 0.686305 0.168385 0.8322 0.605532 0.518693
>>
>> julia> K = [dot(X[:,i], X[:,j]) for i=1:5, j=1:5]
>> 5x5 Array{Any,2}:
>> 0.737716 0.603229 1.09884 0.865174 0.832958
>> 0.603229 0.962978 1.16994 0.988988 1.06501
>> 1.09884 1.16994 2.00739 1.45298 1.54767
>> 0.865174 0.988988 1.45298 1.36347 1.35304
>> 0.832958 1.06501 1.54767 1.35304 1.42861
>>
>> I expect to get an Array{Float64,2}, but what I got is Array{Any,2}.
>> How to get Array{Float64,2} using Array comprehension?
>>
>> Thanks before
>> Rizal
>>
>
>
