function y = g(x)

y = zeros(size(x));

%region 1
idx = find(x>-1 & x<2);
if ~isempty(idx)
    t=x(idx)+1;
    y(idx)=t.*t/3;
end

%region 2
idx = find(x>=2 & x<=3);
if ~isempty(idx)
    y(idx)=3;
end

%region 3
idx = find(x>3 & x<6);
if ~isempty(idx)
    t = x(idx)-3;
    y(idx)=3-t.*t/3;
end

Published with MATLAB® 7.6