如何在MATLAB中遍历嵌套的struct字段 [英] How to loop through nested struct fields in MATLAB

问题描述

我有几个主题的数据，每个主题都对一项活动进行了多次试验.我已经将所有数据读入格式的结构中 subject(1).trial(1).something subject(1).trial(2).somethingelse 等

I have data on several subjects that each performed several trials of an activity. I have read all the data into structs in the format subject(1).trial(1).something subject(1).trial(2).somethingelse etc.

现在，我需要将每个试验连续读入一个大矩阵[A]，以便对每个试验进行一些计算，就好像该主题无关紧要.所以我从这里开始:

Now I need to read each of the trials into a row a big matrix [A] to perform some calculations on each trial, as if the subject didn't matter. So I started with this:

for i = 2:numSubjects
    for j = 1:numTrials
    A(j,:) = cat(2,subject(i).trial(j).torque_integral,     subject(i).trial(j).work_integral); 
    end
end

但这仅适用于第一个主题.当主题(i)增至3时，试验(j)将恢复为1.因此，想法是输出A像这样排列:

But this will only work for the first subject. When the subject (i) increments to 3, the trial (j) will be back at one. So the idea is the output A lines up like this:

subject | trial | A

subject|trial|A

1 1 1

1 2 2

1 3 3

2 1 4

2 2 5

2 3 6

希望这很清楚.有什么想法吗?

Hopefully this is clear. Any thoughts?

推荐答案

如果我正确阅读了您的问题，则需要将每个试验都放在一行中，因此在使A变量时，不要使用j作为索引，而只需使用一个新的索引... 大声笑似乎有人在我之前发布了同样的内容...

If i read your question correctly, you need to put each trial in one row, so when make your A variable, instead of using j as index, just use a new index... lol seems like someone just posted the same thing before me...

m=1
for i = 2:numSubjects
    for j = 1:numTrials
       A(m,:) = cat(2,subject(i).trial(j).torque_integral,subject(i).trial(j).work_integral);
       m=m+1; 
    end
end

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