Resort struct elements by one field values

Hello,

In a struct

A = struct('f1', [some values], 'f2', [some values])

Can we resort elements of A by increasing order in f1?

For example:

A = struct('f1', [some values], 'f2', [some values])

A.f1 is a 1 X 5 double value [3, 4, 1, 2, 5]
A.f2 is 1 X 5 double value   [val 3, val 4, val 1, val 2, val 5]

How to create another struct B as

B = struct('f1', [1 , 2, 3, 4, 5], 'f2', [val 1, val 2, val 3, val 4, val 5])?

[Walter Roberson]

One can re-sort in Matlab, and one can resort -to- Matlab, but I didn't know of any Matlab Resort ;-)

Answer 1

[Matt Tearle]

Would this do it?

a.foo = [3, 4, 1, 2, 5];
a.bar = {'a','b','c','d','e'};
% assuming b already exists
b = a;
% reorder b
[sortfoo,idx] = sort(a.foo);
b.foo = sortfoo;
b.bar = b.bar(idx)

[REN]

yes, thanks all

Answer 2

[Giovanni Soldi]

Try in this way:

B = struct('f1',sort(A.f1),'f2',sort(A.f2));

[REN]

but in f2 val 3, val 4, val 1, val 2, val 5 can not be sorted

f2 can be only sorted according to value in f1

[REN]

even f2 can be sorted by increasing oder,

if try

B = struct('f1',sort(A.f1),'f2',sort(A.f2));

a result maybe

B.f1 = [1 2 3 4 5]

B.f2 = [val 2 val 3 val 4 val 5 val 1]

because val 2 < val 3 < val 4 < val 5 < val 1