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From |
Charles Koss <[email protected]> |

To |
[email protected] |

Subject |
Re: st: Average of previous years |

Date |
Mon, 11 Apr 2011 08:48:26 -0500 |

There are two other ways for obtaining the same results, by using the tsmooth command. In the first case, you need to place dots while in the second case you need an auxiliary series. In conclusion, for the problem at hand, Dr. Cox's code is the fastest way to go. However, at greater windows (say 20) is ineficient. Take a look at the following code, I think the second case is the least prone to error. //START clear webuse bsales line sales t generate float salesm5= (l.sales+l2.sales+l3.sales+l4.sales+l5.sales)/5 //First CASE tssmooth ma sm2 = l5.sales, window(0 1 4) //replace values in obs 2 to 5 replace sm2 = . in 2 replace sm2 = . in 3 replace sm2 = . in 4 replace sm2 = . in 5 //Second CASE //aux ser =sm1 tssmooth ma sm1 = sales, window(0 1 4) generate float salesm5ma = l5.sm1 //END Charles -- Charles Koss http://charlesonnet.blogspot.com On Sat, Apr 9, 2011 at 1:02 PM, Nick Cox <[email protected]> wrote: > gen y = (L1.x + L2.x + L3.x + L4.x + L5.x) / 5 > > !!! > > On Sat, Apr 9, 2011 at 5:19 PM, Nick Cox <[email protected]> wrote: >> Suppose you have -tsset- your data. Then this is >> >> gen y = (L1.x + L2.x + L3.x + L4.x + L5.x) >> >> Nick >> >> On Sat, Apr 9, 2011 at 4:29 PM, emanuele mazzini >> <[email protected]> wrote: >>> >>> i do have the following problem in generating a new variable: I need >>> to generate a variable which takes the value of the average values of >>> the five preceding years of another variable that I have in my >>> dataset. >>> In other words, supposing my new variable is y at time t, I need that >>> its value is equal to the average of another variable (say x) from t-1 >>> to t-5. >>> >>> Since I am just beginning in using Stata anyone knows how can I deal >>> with this or find any help? >> > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/statalist/faq > * http://www.ats.ucla.edu/stat/stata/ > * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: Average of previous years***From:*Nick Cox <[email protected]>

**References**:**st: Average of previous years***From:*emanuele mazzini <[email protected]>

**Re: st: Average of previous years***From:*Nick Cox <[email protected]>

**Re: st: Average of previous years***From:*Nick Cox <[email protected]>

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