parfor. Error: The variable eavg in a parfor cannot be classified.

Question

Marco Castelli 2014-12-2

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/165013-parfor-error-the-variable-eavg-in-a-parfor-cannot-be-classified

评论： Mohammad Abouali 2014-12-3

采纳的回答： Mohammad Abouali

在 MATLAB Online 中打开

I have already read other topic on Errors and parfor but i don't find the answer to my problem.

My code give me an Error: "Error: The variable eavg in a parfor cannot be classified."

The pice of code with parfor is:

eavg = zeros(size(coeff_d,2),size(coeff_c,2),size(f,1));
parfor i0 = 1:size(vett,2)
    i1 = vett(1,i0);
    i2 = vett(2,i0);
    i3 = vett(3,i0);
            if curva~=2
                if curva==4
                    z_rel = (i3-1)/(size(y,1)-1);
                    newcoeff = (-1.817*(z_rel)^2+2.776*z_rel)*0.7;
                else
                    newcoeff = coeff_c(i2);
                end
                suptemp = EsponenzialeSingola(y(i3,:), f(i3,:),...
                    coeff_d(i1), newcoeff, plottacurve);
            else
                eavg(i1,i2,i3) = EsponenzialeDoppia(y(i3,:), f(i3,:),...
                    coeff_d(i1), coeff_c(i2), plottacurve);
            end
end

the variables coeff_c, coeff_d, f, coeff_c, vett, curva, y and plottacurva are declared befor parfor-loop.

Can you help e to fix the Error?

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Mohammad Abouali 2014-12-2

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/165013-parfor-error-the-variable-eavg-in-a-parfor-cannot-be-classified#answer_160882

your parfor is based on i0 eavg is not being sliced by that.

So it doesn't know how to slice eavg and then once it comes out of parfor it doesn't know how to combins it.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

Answer 2

Marco Castelli 2014-12-3

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/165013-parfor-error-the-variable-eavg-in-a-parfor-cannot-be-classified#answer_161075

编辑：Marco Castelli 2014-12-3

在 MATLAB Online 中打开

@Mohammad Abouali : Thanks to you help I solve the problem in this way:

parfor i0 = 1:size(vett,2)
    if curva~=2
        if curva==4
            z_rel = (vett(3,i0)-1)/(size(y,1)-1);
            newcoeff = (-1.817*(z_rel)^2+2.776*z_rel)*0.7;
        else
            newcoeff = coeff_c(vett(2,i0));
        end
        eavg(i0) = EsponenzialeSingola(y(vett(3,i0),:), f(vett(3,i0),:),...
            coeff_d(vett(1,i0)), newcoeff, plottacurve);
    else
        eavg(i0) = EsponenzialeDoppia(y(vett(3,i0),:), f(vett(3,i0),:),...
            coeff_d(vett(1,i0)), coeff_c(vett(2,i0)), plottacurve);
    end
end