combined operations on struct arrays

I have a struct S

S=struct()

It has 2 fields a,b

S(1).a=2;
S(2).a=3;
S(3).a=4;

now how do i do something like

S(:).a=S(:).a+[ 5 6 7 ]

Answer 1

[Azzi Abdelmalek]

S=struct('a',cellfun(@plus, {S.a},{5 6 7},'un',0))

[Archit]

I want something more readable as the example i gave is very simplified.

In reality i have array of struct (having 12 fields) of 100000 elements and i have to do complicated calculation sometimes on S.field1

something on the lines of

S.field1=S.field1 .^ 2+cos(S.field1) +const1* S.field1 .* S.field2

so i am pretty sure this hack will not be useful to me. IS there a better way?

[Azzi Abdelmalek]

S=struct('field1',cellfun(@(x,y) x^2+cos(x)+const1*x*y, {S.field1},{S.field2},'un',0))

[Archit]

as i said, i want something readable which should not be cryptic so ur two answers do not serve me

[Azzi Abdelmalek]

What do you mean by readable?

doc cellfun