MATLAB: How to plot exact user defined function

Question

I have defined a function like this

function z=agni(x)
if x > 0
    z=x;
else
    z = x.^2;
end

But in the time of plotting plot(x,agni(x)) with x =[-2:.01:2] generate only the curve of x^2. WHY?

Answer 1

if x > 0

means

if all(x > 0)

so if you pass in a vector of x then if any x in the vector is <= 0 then the "if" will not be true.

You should research logical indexing.