How to concatenate string vectors of unequal length?

Question

Danny 2014-12-20

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https://ww2.mathworks.cn/matlabcentral/answers/167374-how-to-concatenate-string-vectors-of-unequal-length

编辑： Stephen23 2015-1-2

采纳的回答： Image Analyst

If I have thee vectors v1 = {'a' 'b' 'c'}', v2 = {'d'}' and v3 = {'e' 'f'}', how do I create a four vector v4 =

'a' 'd' 'e'

'b' '' 'f'

'c' '' ''

?

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Stephen23 2014-12-21

编辑：Stephen23 2015-1-2

Actually this is concatenating cell arrays of unequal lengths... the fact that these contain strings is totally irrelevant to both the question and the answer. The title should be "How to concatenate cell vectors of unequal length?"

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Answer 1

Image Analyst 2014-12-20

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https://ww2.mathworks.cn/matlabcentral/answers/167374-how-to-concatenate-string-vectors-of-unequal-length#answer_162959

在 MATLAB Online 中打开

Try this:

% Define component cell arrays.
v1 = {'a'; 'b'; 'c'}
v2 = {'d'}
v3 = {'e'; 'f'}
% Find out how  big cell array needs to be.
lv1 = length(v1);
lv2 = length(v2);
lv3 = length(v3);
rows = max([lv1,lv2,lv3])
% Instatiate cell array of the max size.
v4 = cell(rows, 3)
% stuff each column in.
v4(1:lv1, 1) = v1;
v4(1:lv2, 2) = v2;
v4(1:lv3, 3) = v3;
% Print out results
fprintf('\n\nHere is the output cell array:\n');
v4

In the command window:

Here is the output cell array:

v4 = 
    'a'    'd'    'e'
    'b'     []    'f'
    'c'     []     []

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Danny 2014-12-20

Thank you.

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Answer 2

Azzi Abdelmalek 2014-12-20

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在 MATLAB Online 中打开

v1 = {'a' 'b' 'c'}', 
v2 = {'d'}' 
v3 = {'e' 'f'}'
v=cell(3,3)
v(:,:)={' '}
v(1:3,1)=v1
v(1,2)=v2
v(1:2,3)=v3

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Answer 3

Thorsten 2014-12-20

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https://ww2.mathworks.cn/matlabcentral/answers/167374-how-to-concatenate-string-vectors-of-unequal-length#answer_162963

在 MATLAB Online 中打开

 v1 = {'a' 'b' 'c'}';
 v2 = {'d'}';
 v3 = {'e' 'f'}'; 
 m = max([numel(v1) numel(v2) numel(v3)]);
 if numel(v1) < m, v1{m} = []; end
 if numel(v2) < m, v2{m} = []; end
 if numel(v3) < m, v3{m} = []; end
 M = [v1 v2' v3]';
 X = M(:);

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Answer 4

Shoaibur Rahman 2014-12-20

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https://ww2.mathworks.cn/matlabcentral/answers/167374-how-to-concatenate-string-vectors-of-unequal-length#answer_162964

编辑：Shoaibur Rahman 2014-12-20

在 MATLAB Online 中打开

v1 = {'a' 'b' 'c'}';
v2 = {'d'}';
v3 = {'e' 'f'}';
Lv1 = length(v1); Lv2 = length(v2); Lv3 = length(v3);
n = max([Lv1 Lv2 Lv3]);
v1cell = [v1; cell(n-Lv1,1)];
v2cell = [v2; cell(n-Lv2,1)];
v3cell = [v3; cell(n-Lv3,1)];
v4 = [v1cell v2cell v3cell];