Y = sort(X)
[Y,I] = sort(X)
sort(X)
, where X
is a matrix of real values, sorts each column of X
in ascending order. If X
is a vector of real values, sort
sorts the elements of X
in ascending order. NaN
s appear at the end of the sorted list, after the highest integers. For identical values in X
, the location in the input vector or matrix determines location in the sorted list.
sort
orders complex input according to magnitude. Again, NaN
s are appear at the end of the sorted list. For identical values, the phase of the input value on the interval [-pi pi
] determines the final location. (A value that occurs directly on the negative real axis has phase -pi
.) If the phase of the values is equal, sort
uses location in the input vector or matrix to determine location in the sorted list.
[Y,I] = sort(X)
, where X
is a matrix, also returns an m
-by-n
index matrix I
, with each column a permutation of 1:m
, so that for j = 1:n
, Y(:,j)
=
X(I(:,j),j)
. If X
is a vector, I
is an index vector, a permutation of 1:n
, so that Y = X(I)
.
If X
has repeated elements of equal value, indices are returned that preserve the original relative ordering.
When X
is complex, the elements are sorted by abs(X)
.
X = magic(4)
ThenX =
16 2 3 13
5 11 10 8
9 7 6 12
4 14 15 1
[Y,I] = sort(X)
produces
Y =
4 2 3 1
5 7 6 8
9 11 10 12
16 14 15 13
I =
4 1 1 4
2 3 3 2
3 2 2 3
1 4 4 1
find
,max
,mean
,median
,min
(c) Copyright 1994 by The MathWorks, Inc.