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 主题工具 显示模式 2019-11-23, 08:05 PM #1 高级会员   注册日期: 2019-11-21 帖子: 2,897 感谢他人: 0 有 0 帖获得 0 感谢 声望力: 60  Optimal way of doing iterative assembly of sparse matrices in Matlab? My code needs to in a loop modify the elements of a sparse matrix. Doing this matlab warns me that This sparse indexing expression is likely to be slow. I am preallocating the sparse arrays using the Spalloc function but am still getting this warning. What is the optimal approach for assembling of sparse matrices? This is what I am currently doing. K=spalloc(n,n,100); f=spalloc(n,1,100);for i = 1:Nel [Ke,fe] = myFunction(Ex(i),Ey(i)); inds = data(i,2:end); K(inds,inds) = K(inds,inds) + Ke; f(inds) = f(inds)+fe; endthe indices in inds may be appear several times in the loop, meaning an element in K or f may receive multiple contributions. The last two lines within the loop are where I'm getting warnings. 更多...  主题工具 显示可打印版本 邮寄本页给好友 显示模式 平板模式 切换到混合模式 切换到树形模式 发帖规则 您不可以发表新主题 您不可以发表回复 您不可以上传附件 您不可以编辑自己的帖子 启用 BB 代码 论坛禁用 表情符号 论坛启用 [IMG] 代码 论坛启用 HTML 代码Trackbacks are 禁用 Pingbacks are 禁用 Refbacks are 禁用 版面规则

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