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Re: Means

• To: mathgroup at smc.vnet.net
• Subject: [mg73939] Re: Means
• From: "JGBoone at gmail.com" <JGBoone at gmail.com>
• Date: Sat, 3 Mar 2007 01:12:27 -0500 (EST)
• References: <es9295$3na$1@smc.vnet.net>

Yeah Bob that line you gave me does the same as N[Mean[Map[Last,
list]]]. It goes to the second part of the pair and takes the average
of all. I want to take only the average of the last half of the last
half. So i have 3000 pairs that look like {a,b}
i've got a way to take the means of all the b's in list of 3000. but i
want to take the mean's of the last 1500 b's.