Matlab：将单元格数组转换为单个单元格数组

Question

我有，D 是不匹配的字符串元胞数组的元胞数组

A = 

{'abc'; 

'acd' ;

'aaa'}


B = 

{'baa' ;

'bbb'}


C = 

{'acc';

'aaa';

'aad'}

D = { {A}, {B}, {C}}

A、B、C的大小不同，我本来就不知道它们的大小，所以我把它们组合成D。如何将D转换成一个元胞数组，这样我就可以写了进入 excel sheet?

即

D = 
{'abc' 'baa' 'acc';

'acd' 'bbb' 'aaa';

'aaa' ' '   'aad'}

Answer 1

您可以让 MATLAB 在需要时展开元胞数组：

F={}; 
for k = 1:numel(D), 
    F(1:numel(D{k}), end+1)=D{k}; 
end

这导致

F = 
    'abc'    'baa'    'acc'
    'acd'    'bbb'    'aaa'
    'aaa'       []    'aad'

如果将空矩阵作为空字符串很重要，请使用

>> F(cellfun('isempty', F))={''}
F = 
    'abc'    'baa'    'acc'
    'acd'    'bbb'    'aaa'
    'aaa'    ''       'aad'

Answer 2

这将是一种矢量化方法 -

D = { {A}, {B}, {C}} %// Code from question (not tinkering with it)

%// Extract all cells data at each cell index position. 
%// In other words, reduce level of cell data storage by one step.
D1 = vertcat(D{:})

%// Get lengths of each cell
lens = cellfun('length',D1)

%// Initialize output cell array
out_cell = cell(max(lens),numel(lens))

%// Mask of valid cell positions in the output
mask = bsxfun(@le,[1:max(lens)]',lens(:).')

%// Store concatenated cell data into masked positions in output
out_cell(mask) = vertcat(D1{:})

样本运行-

>> A,B,C
A = 
    'abc'
    'acd'
    'aaa'
B = 
    'baa'
    'bbb'
C = 
    'acc'
    'aaa'
    'aad'
>> out_cell
out_cell = 
    'abc'    'baa'    'acc'
    'acd'    'bbb'    'aaa'
    'aaa'       []    'aad'

请注意，如果您在开始时这样做，您可以完全避免创建 D -

D1 = {A,B,C}

Matlab：将单元格数组转换为单个单元格数组

Matlab: Convert cell array of cells into a single cell array

arrays

matlab

cell-array