为什么 innerjoin 在 parfor 中不起作用

why innerjoin does not work in parfor

在matlab中用parfor写代码。我有一个错误,因为使用 innerjoin 如下。我发现由于

存在透明度错误
N_boot = 5;
coeff_out2 = zeros(N_boot,N_coef);
sampled_id01 = zeros(Ndecisions,1);
sampled_id2 = table(sampled_id01, 'VariableNames', {'decision_id00'});
resample_dta = [];
parfor i = 1:N_boot
dta2 = dta;
dta2.Properties.VariableNames{1} = 'decision_id00';
decisions2 = unique(dta2.decision_id00);
Ndecisions2 = size(decisions2,1);
sampled_id01 = randsample(decisions2,Ndecisions2,true);
sampled_id2 = table(sampled_id01, 'VariableNames', {'decision_id00'});
resample_dta = innerjoin(sampled_id2,dta2,'Keys','decision_id00');
resample_dta = table2array(resample_dta);
result1 = mean(resample_dta(:,1:4));
coeff_out2(i,:) = result1;
end

这段代码一直在说

Error using tabular/innerjoin (line 96)
Transparency violation error.

不知道为什么像上面那样使用innerjoin会出现透明错误。当我只使用 for-loop 时,没有问题。

不幸的是,innerjoin 使用了 inputname 函数,这导致了 "transparency violation" 错误。有一个简单的解决方法,就是将调用包装到 innerjoin,如下所示:

innerjoinFcn = @(varargin) innerjoin(varargin{:});
parfor ...
    ...
    resample_dta = innerjoinFcn(sampled_id2,dta2,'Keys','decision_id00');
end