Sorting a matrix by one column

2 次查看（过去 30 天）
José Pereira
José Pereira 2017-12-7
评论： José Pereira 2017-12-7
So i have this "matrix". First column is names, second colomn is passwords. I want to display this data alphabetically by name. I don´t know how to do this.So here is the original matrix,
{'john'} {'jojo'}
{'victor'} {'vivi'}
{'andre'} {'dredre'}
and here is the result i want to display:
{'andre'} {'dredre'}
{'john'} {'jojo'}
{'victor'} {'vivi'}
Thanks!

请先登录，再回答此问题。

采纳的回答

KL
KL 2017-12-7
编辑：KL 2017-12-7
That's not a matrix. If you meant to store them in cell arrays,
C = {'john', 'jojo';'victor', 'vivi';'andre', 'dredre'};
It would look like
C =
6×1 cell array
'john' 'jojo'
'victor' 'vivi'
'andre' 'dredre'
Now use just sortrows
https://www.mathworks.com/help/matlab/ref/sortrows.html
C = sortrows(C,1)
3×2 cell array
'andre' 'dredre'
'john' 'jojo'
'victor' 'vivi'
Neverthless better idea to store such data is to use tables,
names = {'John';'victor';'andre';};
passwords= {'jojo';'vivi';'dredre'};
T = table(passwords,'RowNames',names)
and it looks like,
T =
3×1 table
passwords
_________
John 'jojo'
victor 'vivi'
andre 'dredre'
now, again sortrows,
sortrows(T)
3×1 table
passwords
_________
andre 'dredre'
John 'jojo'
victor 'vivi'
  3 个评论
显示 1更早的评论
KL
KL 2017-12-7
If you are still opting to use cell array, then simply use sort and only for first column. Extract the sorted indices from the result and use it sort the original cell array.
C = {'john', 'jojo';'victor', 'vivi';'andre', 'dredre'}
[~,indx] = sort(C(:,1));
sortedC = C(indx,:)
sortedC =
3×2 cell array
'andre' 'dredre'
'john' 'jojo'
'victor' 'vivi'
José Pereira
José Pereira 2017-12-7
That is exactly what i wanted. Thanks

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Shifting and Sorting Matrices 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by