How to concatenate string vectors of unequal length?

16 visualizzazioni (ultimi 30 giorni)
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 Commento
Stephen23
Stephen23 il 21 Dic 2014
Modificato: Stephen23 il 2 Gen 2015
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?"

Accedi per commentare.

Risposta accettata

Image Analyst
Image Analyst il 20 Dic 2014
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' [] []

Più risposte (3)

Azzi Abdelmalek
Azzi Abdelmalek il 20 Dic 2014
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 il 20 Dic 2014
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 il 20 Dic 2014
Modificato: Shoaibur Rahman il 20 Dic 2014
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];

Categorie

Scopri di più su Parallel for-Loops (parfor) in Help Center e File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by