get only addends of subexpression

Suppose I have a symbolic expression like this

syms x x0
f=(x-x0)^3
children(f)
[(x-x0),3]

I would like to get instead

[(x-x0)^3]

How can this be done?

[Steven Lord]

Can you say a little more about your ultimate goal? Perhaps there's a way to do what you want without running a MuPAD expression via feval(symengine, ...).

Answer 1

[Walter Roberson]

You cannot do that with children().

You need to do something like,

feval(symengine, '(V) -> if testtype(V,"_plus") then [op(V)] else [V] end_if;', f)

[David Armendáriz]

Thanks, and is there any way to do the same but with multiplication? I mean, if I have

f=a*b*c*d

I would like to get

[a,b,c,d]

And when

f=a

then the output is

[a]

[Walter Roberson]

Use _mult instead of _plus for that purpose.