Cellfun:如何对矩阵的单元格阵列中的每一行求和? Matlab的 [英] Cellfun : How to sum each row in a cell array of matrices? Matlab

问题描述

假设我有3x3的单元格，每个单元格包含9x9的矩阵，我将如何使用cellfun求和整个单元格阵列的每一行?

Say I have 3x3 cells, each cell containing a matrix of 9x9, how would I go about using cellfun to sum each row of the entire cell array?

当尝试在大括号中使用:时，我不断收到错误坏单元格引用".

I keep obtaining the error ''bad cell reference'' when I try to use the : in the curly brackets.

我宁愿不将其转换为矩阵，然后再次返回单元格.

I'd rather not convert it to a matrix then back to cells again.

非常感谢您的智慧！

推荐答案

这里是将每个矩阵的行与一个单元格相加的解决方案，如果您仔细阅读cellfun的文档，我认为您应该可以它.

Here is the solution for summing row of each matrix with a cell , if you read the documentation of cellfun carefully, I think you should be able to get it.

clc;
clear all;
a=cell(3,3);
for i=1:3
    for j=1:3
        a{i,j}=randi(10,[9 9]);
    end
end

row_sum_cell=cellfun(@(a) sum(a,2),a,'UniformOutput',false);

以下解决方案对单元格数组中的整个行求和:

The following solution sums the entire row across the cell array:

clc;
clear all;
a=cell(3,3);
for i=1:3
    for j=1:3
        a{i,j}=randi(10,[9 9]);   %generating the cell array
    end
end

[r,c]=size(a);          %getting the size of the array to concatenate it at runtime
horzCat_A=cell(r,1);

for i=1:r
    for j=1:c
        horzCat_A{i,1}=[horzCat_A{i,1} a{i,j}];    %concatenating
    end
end

%after getting a concatenated matrix, apply a cellfun same as in previous example.
cell_row_sum=cellfun(@(horzCat_A) sum(horzCat_A,2),horzCat_A,'UniformOutput',false);

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