The mode of a discrete probability distribution is the value x at which its probability mass function takes its maximum value. http://en.wikipedia.org/wiki/Mode_%28statistics%29つまり，最頻値．

IEEE D. Personal Servers. Authors and/or their companies shall have the right to post their IEEE-copyrighted material on their own servers without permission, provided that the server displays a prominent notice alerting readers to their o…

判別するのに2秒分使っていて，Count==5だと，Index=0のデータは手前のデータと合わせて2秒分のデータが作れないから．↑嘘．フィルター通すのに，最初の方のデータはおかしなことになるから．