How can I plot my piece-wise function?

I have 4 vectors for my variables:

a(i) = [0.0385, 0.1379, 1, 0.1379];

b(i) = [0.1961, 1.8289, -1.7164, -0.2033];

c(i) = [12.9973, 3.0504, -6.8966, 3.0504];

d(i) = [-13.2626, -13.2626, 13.2626, 13.2626];

I also have the vector: x(i) = [-1, -0.5, 0, 0.5]

These are going to be used in this equation to form 4 separate equations:

f(x) = ai + bi(x-xi) + ci(x-xi)^2 + di(x-xi)^3

I need to plot the four equations like:

f1(x) = ..... from x = -1 to -.5

f2(x) = ..... from x = -.5 to 0

f3(x) = ..... from x = 0 to .5

f4(x) = ..... from x = .5 to 1

I am at a loss for how I can even begin to plot something like this in MATLAB. I've been playing around with for loops, but I am having a lot of difficulty defining the x variable that is not the x(i) variable.

Answer 1

[madhan ravi]

See fplot() and piecewise