How to concatenate string vectors of unequal length?

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Danny
Danny 2014-12-20
编辑： Stephen23 2015-1-2
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' '' ''
?
  1 个评论
Stephen23
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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采纳的回答

Image Analyst
Image Analyst 2014-12-20
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' [] []

更多回答（3 个）

Azzi Abdelmalek
Azzi Abdelmalek 2014-12-20
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
Thorsten
Thorsten 2014-12-20
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(:);
Shoaibur Rahman
Shoaibur Rahman 2014-12-20
编辑：Shoaibur Rahman 2014-12-20
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];

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