在MATLAB矩阵阵列 [英] Array of Matrices in MATLAB

问题描述

我要寻找一种方法来存储在MATLAB数组大量可变数量矩阵。

是否有实现这一目标的任何方式？

例如：

 对于i：1：未知
  myArray的（ⅰ）=零（500,800）;
结束
 

在哪里未知数是数组的长度不同的，我可以，如果需要额外的信息修改。

更新：
性能我试图做到这一点的主要原因。我哪里会抓取数据作为一个矩阵，显示它在实时，然后继续处理下一组数据之前，有它。

我试图用它多维数组由罗科以下建议，但是我的数据是如此之大，我跑出记忆，我可能不得不考虑另一种选择我的情况。将更新，我尝试其他建议。

更新2：
谢谢大家的建议，但我应该有事先指定，precision和速度都在这里不可或缺的因素，我可能会考虑回去我原来的方法尝试3维数组前，重新评估方法导入的数据。

解决方案

如果所有的矩阵将是相同的大小（即500x800），那么你可以做一个三维数组：

  n未知; ％未知阵列的数
myArray的=零（500,800，n未知）;
 

要访问一个数组，可以使用下面的语法：

 子矩阵= myArray的（：，：，3）; ％获取第三矩阵
 

您可以在几个方面增加更多的矩阵来myArray的

  myArray的=猫（3 myArray的，零（500,800））;
％ 要么
myArray的（：，：，n未知+ 1）=零（500,800）;
 

如果每个矩阵不会是相同的大小，你需要使用电池阵列像胡沙姆建议。

编辑：我错过了大约运行内存的一部分。我猜你的n未知是相当大的。您可能需要（如果你使用的是单一的整数甚至uintXX型）切换矩阵的数据类型。您可以在调用零做到这一点：

  myArray的=零（500,800，n未知，'单'）;
 

I am looking for a way to store a large variable number of matrixes in an array in MATLAB.

Are there any ways to achieve this?

Example:

for i: 1:unknown
  myArray(i) = zeros(500,800);
end

Where unknown is the varied length of the array, I can revise with additional info if needed.

Update: Performance is the main reason I am trying to accomplish this. I had it before where it would grab the data as a single matrix, show it in real time and then proceed to process the next set of data.

I attempted it using multidimensional arrays as suggested below by Rocco, however my data is so large that I ran out of Memory, I might have to look into another alternative for my case. Will update as I attempt other suggestions.

Update 2: Thank you all for suggestions, however I should have specified beforehand, precision AND speed are both an integral factor here, I may have to look into going back to my original method before trying 3-d arrays and re-evaluate the method for importing the data.

解决方案

If all of the matrices are going to be the same size (i.e. 500x800), then you can just make a 3D array:

nUnknown;  % The number of unknown arrays
myArray = zeros(500,800,nUnknown);

To access one array, you would use the following syntax:

subMatrix = myArray(:,:,3);  % Gets the third matrix

You can add more matrices to myArray in a couple of ways:

myArray = cat(3,myArray,zeros(500,800));
% OR
myArray(:,:,nUnknown+1) = zeros(500,800);

If each matrix is not going to be the same size, you would need to use cell arrays like Hosam suggested.

EDIT: I missed the part about running out of memory. I'm guessing your nUnknown is fairly large. You may have to switch the data type of the matrices (single or even a uintXX type if you are using integers). You can do this in the call to zeros:

myArray = zeros(500,800,nUnknown,'single');

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