arrays - 元胞数组内元胞数组顺序元素 Matlab

Question

我有一个包含如下单元格的单元格数组：

A=
<1x4 cell>  <1x4 cell>  <1x4 cell>
<1x4 cell>  <1x4 cell>  <1x4 cell>
<1x4 cell>  <1x4 cell>  <1x4 cell>
<1x4 cell>  <1x4 cell>  <1x4 cell>
<1x4 cell>  <1x4 cell>  <1x4 cell>
<1x4 cell>  <1x4 cell>  <1x4 cell>
<1x4 cell>  <1x4 cell>  <1x4 cell>
<1x4 cell>  <1x4 cell>  <1x4 cell>
<1x4 cell>  <1x4 cell>  <1x4 cell>
<1x4 cell>  <1x4 cell>  <1x4 cell>

每个单元格都包含数值，例如A{1,1}=[1.6386e+03] [1589] [406.9268] [184.6770]

鉴于此a={'el1','el2','el3','el4'}，我想获得以下形式的输出 B：

B{1}=[a;A{1,1};A{2,1};A{3,1}...]
B{1}=
'el1'   'el2'   'el3'   'el4'
1638.60000000000    1589          406.926813049605                  184.676951989012
1665.10000000000    1614.60000000000    399.333905068047    362.462074500098
1709.60000000000    1657.80000000000    389.181059994089    529.870013181953
...

B{2}=[a;A{1,2};A{2,2};A{3,2}...]
...

如何在不写入每个单元格的情况下执行此操作（即 A{1,1};A{1,2}...）

Answer 1

您可以使用连接 ( cat) 和索引来获得此结果：

%Create some inputs
A = arrayfun(@(~)num2cell(randn(1,4)),zeros(10,3), 'uniformoutput',false);
a={'el1','el2','el3','el4'};

然后创建您的 B{1} 元胞数组：

%Vertically concatenate the a header with all elements in the first column of A
B{1} = cat(1, a, A{:,1})

创建所有 B

for ixColumn = 1:size(A,2)   %Or, loop backwards for slightly better performance.  IE "ixColumn = (size(A,2):-1:1"
    B{ixColumn } = cat(1, a, A{:,ixColumn });
end