Question

我在单元格数组中有许多行，行的末尾有很多额外的空格，如下所示：

'a' 'b' 'c' 'd' [] [] [] [] []
'1' '2' '3' [] [] [] [] [] []
'w' 'x' 'y' 'z' [] [] [] [] []

我想将第二行复制到第一行的末尾，如下：

'a' 'b' 'c' 'd' '1' '2' '3' [] []
'1' '2' '3' [] [] [] [] [] []
'w' 'x' 'y' 'z' [] [] [] [] []

请注意，上面给出的代码是一个任意的例子来说明我想做什么。实际上，我将此功能作为更复杂功能的一个步骤。

我尝试在单元格数组行中搜索第一个空元素，但由于某种原因，isempty不会将它们视为空。是否有人可以指向我的替代方法？

编辑：完成上述步骤后，第二行将被删除，给出：

'a' 'b' 'c' 'd' '1' '2' '3' [] []
'w' 'x' 'y' 'z' [] [] [] [] []

虽然真正的单元格数组将有比3更多的行。

Answer 1

我认为这可以满足您的需求。我已将您的单元格数组表示为c。

n1 = find(cellfun('isempty',c(1,:)), 1); %// first empty cell in row 1
n2 = find(cellfun('isempty',c(2,:)), 1); %// first empty cell in row 2
c(1,n1:n1+n2-2) = c(2,1:n2-1); %// copy the relevant part of row 2 onto row 1

如果第2行中非空单元格的数量超过第1行中的空单元格数，则会自动水平扩展单元格。

示例：输入：

c = {'a' 'b' 'c' 'd' [] [] [] [] []
'1' '2' '3' [] [] [] [] [] []
'w' 'x' 'y' 'z' [] [] [] [] []}

输出：

c = 
    'a'    'b'    'c'    'd'    '1'    '2'    '3'    []    []
    '1'    '2'    '3'     []     []     []     []    []    []
    'w'    'x'    'y'    'z'     []     []     []    []    []

Answer 2

以下是一种使用高效 logical indexing 来选择非空单元格的一般方法，单cellfun('isempty'调用并自动扩展，如{{3}中所述} -

C = {
'a' 'b' 'c' 'd' [] [] [] [] []
'1' '2' '3' [] [] [] [] [] []
'w' 'x' 'y' 'z' [] [] [] [] []} %// Input cell array

N = 2; %//Number of rows to process, starting from 2 until the number of rows in C
Ct = C'; %//'# Transpose input cell array, as collecting elements that way is easier
vals = Ct(~cellfun('isempty',Ct(:,1:N))); %//'# elements from selected row(s)
C(1,1:numel(vals)) = vals; %// Place the values into the first row

问题中所述的情况为N = 2，输出为 -

C = 
    'a'    'b'    'c'    'd'    '1'    '2'    '3'    []    []
    '1'    '2'    '3'     []     []     []     []    []    []
    'w'    'x'    'y'    'z'     []     []     []    []    []

使用N = 3，您可以复制第一行末尾的第二行和第三行。因此，输出将是 -

C = 
    'a'    'b'    'c'    'd'    '1'    '2'    '3'    'w'    'x'    'y'    'z'
    '1'    '2'    '3'     []     []     []     []     []     []     []     []
    'w'    'x'    'y'    'z'     []     []     []     []     []     []     []

等等。

在单元格数组中合并2行

2 个答案: