symbolic vector multiplication

Hello,

I am new to the symbolic math toolbox, and I have a question regarding
vector multiplication. Suppose I have

syms a b c
f = a*b*c

if I want to evaluate this for the case where a and b are 1-D vectors
(for example, a = (1:10), b = 3*(1:10)) and c
is a scalar, how can I do this?

(If I were doing it staight from matlab, I would use: f = a.*b.*c, but
the symbolic expression won't let me use the . for array
multiplication)

If I try:
subs(f, {a,b,c},{(1:10),3*(1:10),4), I get the error message:
"Elements of the substitution cell array must be of the same size"

If I try:
a = (1:10)
b = 3*(1:10)
c = 4

eval(f)

I get the error message: "Inner matrix dimensions must agree."

if I transpose b and try it again, it works, but it has done matrix
multiplication, leaving me with a single value, not a vector result.

Is there a way to do this? Or, more specifically, is there a way to
do this that doesn't require looping through the vector elements?

thanks,
melissa

.