How to use cgs with your own matrix-vector multiplication?

From doc cgs I see, you can call the cgs function like:

 x=cgs(@afun, b);

function afun is your self defined matrix vector multiplication function. But how pass parameters to afun? If function afun is defined as

function y=afun(a, b, c, d)

As you can see, afun uses 4 parameters. How to pass them to afun? Can one just use the following

x=cgs(@afun(a,b,c,d), b)

Thanks!

Answer 1

[James Tursa]

If a,c,d are pre-existing constant terms, you could use an anonymous function. E.g.,

afun2 = @(b)(afun(a,b,c,d))

then

x = cgs(afun2, b)