Sorting a matrix by one column
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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!
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KL
2017년 12월 7일
편집: KL
2017년 12월 7일
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
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'
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KL
2017년 12월 7일
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'
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