如何为DArray的元素设置值? [英] How to set values to the elements of DArray?

问题描述

我正在探索Julia的并行计算，并尝试了以下方法:

I'm exploring the parallel computing of Julia and tried this:

a=dzeros(5);a[1]=5

但刚收到此错误:

setindex! not defined for DArray{{Float64, 1, Array{Float64, 1}}

好吧，我认为手册说setindex!由DArray完全实现.我错过了什么?

Well, I thought the manual said setindex! is fully implemented by DArray. What have I missed?

我在32位Windows操作系统上使用的是v0.2.1.

I was using v0.2.1 for Windows 32-bit.

推荐答案

我也是一个资源管理器，但在阅读

I'm just an explorer too, but after reading Julia's Distributed Arrays Docs, I tried this which seemed to work.

$ ./julia 
               _
   _       _ _(_)_     |  A fresh approach to technical computing
  (_)     | (_) (_)    |  Documentation: http://docs.julialang.org
   _ _   _| |_  __ _   |  Type "help()" to list help topics
  | | | | | | |/ _` |  |
  | | |_| | | | (_| |  |  Version 0.3.0-prerelease+2703 (2014-04-22 18:57 UTC)
 _/ |\__'_|_|_|\__'_|  |  Commit 942ae42* (0 days old master)
|__/                   |  i686-redhat-linux

julia> versioninfo()
Julia Version 0.3.0-prerelease+2703
Commit 942ae42* (2014-04-22 18:57 UTC)
Platform Info:
  System: Linux (i686-redhat-linux)
  CPU: Genuine Intel(R) CPU           T2250  @ 1.73GHz
  WORD_SIZE: 32
  BLAS: libopenblas (DYNAMIC_ARCH NO_AFFINITY)
  LAPACK: libopenblas
  LIBM: libopenlibm

julia> a=dzeros(5)
5-element DArray{Float64,1,Array{Float64,1}}:
 0.0
 0.0
 0.0
 0.0
 0.0

julia> localpart(a)[1]=5
5

julia> a
5-element DArray{Float64,1,Array{Float64,1}}:
 5.0
 0.0
 0.0
 0.0
 0.0

julia> 

在您将分布式数组设为本地"之前，似乎它们不是本地".

It seems that distributed arrays aren't "local" until you make them "local".

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