Find unknown from the equation with given values

I'm try to find the value of an unknown from an equation.

for simplicity sake,

values of a = [1;2;3;4]

a = b + 1

how do i find values of b for each values of a?

thank you so much in advance

Answer 1

[John D'Errico]

b=a-1;

WTP?

Since your real problem is apparently more complex than grade school mathematics, use solve.

syms a b
b = solve(a == b + 1,b)
b =
a - 1

b = double(subs(b,a,1:4))
b =
    0   1   2   3

Or if you don't have the symbolic TB, use fzero, in a loop, solving for one element at a time.

[MUHAMMAD AZFAR BIN ISMAIL]

yeah, the real equation is quite long. thanks, i will try your solution.