Sort isn't properly sorting symbolic variables even though I am assuming them positive

I have this vector "FrecuenciasCorregidas" with 2 values (both depend on "k" and "m"):

I want it to be sorted, so the lower one (3k/20m) goes first and the higher one (k/3m) goes second. So I assume k and m positive and sort:

assume([m,k],'positive');
    FrecuenciasCorregidas=sort(FrecuenciasCorregidas,'ascend')
assume([m,k],'clear');

However, I am still getting the same vector:

Any idea what am I doing wrong? Thanks

[Vladimir Sovkov]

It looks that the symbolic sort function has very limited applicablity. According to Matlab HELP:

sort uses the following rules:

• It sorts symbolic numbers and floating-point numbers numerically.
• It sorts symbolic variables alphabetically.
• In all other cases, including symbolic expressions and functions, sort uses internal sorting rules.

No explanation what are the internal sorting rules.

It seems that in your case it just do it alphabetically.

[El Vapor]

But I am assuming k and m positive, so it should just treat them like numbers, forgetting about the symbolic thing

[Vladimir Sovkov]

No one promised it would.

Answer 1

[Pablo García Fogeda Núñez]

Te he pillado mamón.