Matlab:具有6x6矩阵的结构-如何获取整个组的平均值 [英] Matlab: Structure with 6x6 matrices - how to get the average across the group

问题描述

我有一个名为数据"的结构，其中包含100个条目，每个条目对应于一个实验的参与者. 100个条目中的每个条目都包含多个提供不同值的6x6矩阵.

I have a structure named 'data' with 100 entries, each corresponding to a participant from an experiment. Each of the 100 entries contains multiple 6x6 matrices giving different values.

例如，我的第一个参与者的矩阵示例是:

For instance, an example of a matrix from my first participant is:

data.p001.matrixCB

   18.9737   17.0000   14.2829   12.4499   11.7898   10.0995
   18.1384   16.0000   13.4907   11.7898   11.2250   10.3441
   14.7986   12.5300   11.7898   11.7473   12.2066    9.3808
   14.3527   13.4536   12.9615   13.3417   12.7279   11.7047
   18.0278   17.8885   17.6068   17.4642   17.1464   16.6132
   24.1661   24.7790   23.7697   23.3880   22.6495   23.8537

...这是结构中具有类似设置的100个条目之一.

...and this is one of 100 entries in the structure with a similar setup.

我想获得我100位参与者中矩阵中每个单元的平均值.因此，我将获得位置矩阵CB(1,1)以及矩阵中所有其他位置的100个值的平均值.不幸的是，我看不到它是如何完成的，并且帮助功能远没有帮助.任何帮助将不胜感激！

I'd like to get the mean average value for each cell in the matrix across my 100 participants. So I would have a mean value for the 100 values in position matrixCB(1,1), and all other positions in the matrix. Unfortunately I can't see how this is done, and the help functions are less than helpful. Any assistance would be greatly appreciated!

推荐答案

结构可能很麻烦.为避免输入大量代码，您可以采用以下方法:

Structures can be a pain. To avoid typing out a bunch of code, you could take the following approach:

1. 将所需矩阵转换为单元格数组
2. 将单元阵列重塑为3D矩阵
3. 计算平均值在3D维度上

此代码:

Mcell = arrayfun(@(x) data.(sprintf('p%03d',x)).matrixCB, 1:100, 'uni', 0);
M = mean( reshape(cell2mat(Mcell), 6, 6, []), 3 );

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