Correct error in parfor loop

2022 3 10
1 个回答
回答已采纳
更新时间：2022 3 10
4 次查看（30 天）

0 个投票

I am working on a parfor loop in MatLab R2021b, shown below. But there are errors: Valid indices for 'Time_h1' and 'HD_Top' are restricted in PARFOR loops. I would like to how to solve this issue? Thanks.
parfor j = 1:nk2
if abs(ID_sat) < 1e-5
T_mesh(nt,j) = 11;
Time_h1 (1:11,j) = 0:t_final/10:t_final; % error: restricted in PARFOR loops
HD_Top (1:11,j) = 0; % error: restricted in PARFOR loops
else
...
end
end

请先登录，再回答此问题。

 采纳的回答

Walter Roberson
Walter Roberson 2022-3-10

0 个投票

parfor j = 1:nk2
if abs(ID_sat) < 1e-5
T_mesh(nt,j) = 11;
h1 = Time_h1(:,j);
HT = HD_top(:,j);
h1(1:11) = 0:t_final/10:t_final;
Time_h1(:,j) = h1;
HT(1:11) = 0;
HD_Top(:,j) = HT;
else
...
end
end

4 个评论
显示 2更早的评论 隐藏 2更早的评论

xiaohuo
xiaohuo 2022-3-10
Coud you please explain it? do you meant that it solve the issue using temporary variables?
xiaohuo
xiaohuo 2022-3-10
Another issue in parfor loop
in a parfor loop. variable "Time_h1" and "HD_Top" are indexed in different wats, potentiall causing dependences between iterations.
Would you please give some advice to solve this issue?
parfor j = 1:nk
if abs(ID_sat) < 1e-5
...
else
% "Size_surf_flux" Aray
% Size_surf_flux(1): Numer of row
% Size_surf_flux(2): Numer of column
Size_surf_flux = size (Surface_flux);
T_mesh(nt,j) = Size_surf_flux(1);
T_mesh00 = T_mesh(nt,j); % T_mesh: row number of the array of "Surface_flux"
Time_h1 (1:T_mesh00,j) = Surface_flux(1:T_mesh00,1); % Error: Time_h1
HD_Top(1:T_mesh00,j) = Surface_flux(1:T_mesh00,4); % Error: HD_Top
end
end
Walter Roberson
Walter Roberson 2022-3-10
When you assign to an array that is indexed by a parfor variable, each index has to be either scalar or the : operator; when you read from an array that is indexed by a parfor variable, each index has to be either scalar or the : operator.
t1 = Time_h1(:,j); %okay because it uses :
t1(1:T_mesh00) = Surface_flux(1:T_mesh00,1); %okay because it is not indexed by j
Time_h1(:,j) = t1; %okay because it uses :

请先登录，再进行评论。

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Loops and Conditional Statements 的更多信息

产品

版本

R2021b

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by