Re: Basic programming

*To*: mathgroup at smc.vnet.net*Subject*: [mg93582] Re: Basic programming*From*: Bill Rowe <readnews at sbcglobal.net>*Date*: Sun, 16 Nov 2008 07:03:19 -0500 (EST)

On 11/15/08 at 6:03 AM, frankflip at hotmail.com (BionikBlue) wrote: >I have daily stock prices for a stock on a 100 day period, I want to >compute the standard deviation for a rolling 10 days period for the >whole list of data. >So basically, I would like to do something like this : stdev(1;;10) >then stdev(2;;11) until stdev(91;;100) and get the results in a list If I understand what you want correctly, then StandardDeviation/@Partition[data, 10, 1] will create the list you want Partition with the syntax above creates sublists of length 10 with offsets of 1 for the starting element of each sublist. The rest simply maps StandardDeviation to each sublist to create a list of standard deviations