some thing wrong with SORT function

When I sort using the sort function，the error happened as the picture showed

[Stephen23]

"b does not given the correct location"

It gives exactly the location described in the sort documentation, which states "I is the same size as A and describes the arrangement of the elements of A into B along the sorted dimension. For example, if A is a vector, then B = A(I)." Lets try it and see if that is what MATLAB returns:

V = [35,10,16,10,34];
[a,b] = sort(V,'ascend')

a = 1×5

10 10 16 34 35

b = 1×5

2 4 3 5 1

c = V(b)

c = 1×5

10 10 16 34 35

So far you have not given any explanation of what you think the problem is. I will make a wild guess that you want the inverse indices for applying on the LHS, which can be obtained like so:

[~,d] = sort(b)

d = 1×5

5 1 3 2 4

e = nan(size(d));
e(d) = V

e = 1×5

10 10 16 34 35

Answer 1

[Mehmed Saad]

c = [35 10 16 11 34];

Now after sorting

a = [10 11 16 34 35];

what is the position of first index of a in c. it is 2, for 2nd index of a the position is 4 in c and goes on.

so b is

b = [2 4 3 5 1];

it is giving you positions of elements of a in c.

if you write

c(b)

you will get a

[tuo]

thank you very much