Sorting 2D matrix
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i wanna sort a 2D Matrix like
a = [1 3 0;5 2 8;4 7 10]
without using any existing function in MATLAB like sort,.... i need an algorithm to sort element by element can any one help ? to be
a = [0 1 2;3 4 5;7 8 10]
4 个评论
sloppydisk
2018-5-3
https://en.wikipedia.org/wiki/Sorting_algorithm#Popular_sorting_algorithms This might help, if you have a specific question on your attempt we can help you with the syntax.
John BG
2018-5-4
Hi Ashraf
would it be possible for you to be a bit more specific?
What kind of sorting are you after?
ascending rows descending rows by columns?
sort the rows by their mean? or the variance? or else?
There are many different ways to sort the contents of a matrix.
As soon as you specify a particular sorting algorithm rest assured that the interested readers will be able to supply answers, but until then, all we can do it to guess what algorithm do you really want to go for.
Regards
John BG
per isakson
2018-5-4
Homework?
Jan
2018-5-4
Sorting a matrix elementwise is a strange job. If you do not consider the rows or columns, why is the input and output a matrix and not a vector? Please confirm that this does exactly what you want with Matlab commands:
a = [1 3 0;5 2 8;4 7 10]
b = reshape(sort(a(:)), size(a))
"No existing Matlab functions" cannot work. Even "=" calls subasgn and ">" calls the gt function. Without built-in functions, there is almost nothing, what can be done in Matlab at all.
回答（1 个）
Yuvaraj Venkataswamy
2018-5-4
0 个投票
Use this commands where a is input matrix and S_a is the your required answer.
a = [1 3 0;5 2 8;4 7 10]
b=sort(a(:));
S_a=vec2mat(b,3);
1 个评论
Ameer Hamza
2018-5-4
编辑：Ameer Hamza
2018-5-4
The question specifically mentioned not to use built-in sort() function.
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