function [Y, I] = pickmax(y)
% pick the first 5 picks
Y = zeros(5,1);
I = zeros(5,1);
% get the difference
xd = diff(y);

index = 1;
pos = 0;
for i=1:length(xd)
if xd(i)>0
pos = 1;
else
if pos==1
pos = 0;
Y(index) = xd(i);
I(index) = i-1;
index = index + 1;
if index>5
return
end
end
end
end