MATLAB: Whats this function

Question

function y=Bvanal(x)
[A,B]=size(x);
if A~=1
    'enter a 1X n matrix please'
    return
end
for i=1:B
    y(i)=1.2*abs(x(1,i))*x(1,i);  
end
return

Answer 1

It is a routine called by http://www.mathworks.com/matlabcentral/fileexchange/29413-neural-network-simulation-of-non-linear-mass-spring-damper